61030420 has 24 divisors (see below), whose sum is σ = 139815648. Its totient is φ = 22192800.

The previous prime is 61030379. The next prime is 61030429. The reversal of 61030420 is 2403016.

It is a junction number, because it is equal to n+sod(n) for n = 61030394 and 61030403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61030429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138486 + ... + 138925.

It is an arithmetic number, because the mean of its divisors is an integer number (5825652).

Almost surely, 2^61030420 is an apocalyptic number.

It is an amenable number.

61030420 is an abundant number, since it is smaller than the sum of its proper divisors (78785228).

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

61030420 is a wasteful number, since it uses less digits than its factorization.

61030420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277431 (or 277429 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 61030420 is about 7812.1968741193. The cubic root of 61030420 is about 393.7151436349.

Adding to 61030420 its reverse (2403016), we get a palindrome (63433436).

The spelling of 61030420 in words is "sixty-one million, thirty thousand, four hundred twenty".