61230420 has 36 divisors (see below), whose sum is σ = 185732820. Its totient is φ = 16328064.

The previous prime is 61230401. The next prime is 61230427. The reversal of 61230420 is 2403216.

It is a happy number.

61230420 is a `hidden beast` number, since 612 + 30 + 4 + 20 = 666.

61230420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 32970564 + 28259856 = 5742^2 + 5316^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 61230393 and 61230402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61230427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 169905 + ... + 170264.

It is an arithmetic number, because the mean of its divisors is an integer number (5159245).

Almost surely, 2^61230420 is an apocalyptic number.

61230420 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61230420 is an abundant number, since it is smaller than the sum of its proper divisors (124502400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61230420 is a wasteful number, since it uses less digits than its factorization.

61230420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340184 (or 340179 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 61230420 is about 7824.9869009475. The cubic root of 61230420 is about 394.1447499958.

Adding to 61230420 its reverse (2403216), we get a palindrome (63633636).

The spelling of 61230420 in words is "sixty-one million, two hundred thirty thousand, four hundred twenty".