61230720 has 64 divisors (see below), whose sum is σ = 195179040. Its totient is φ = 16327680.

The previous prime is 61230703. The next prime is 61230727. The reversal of 61230720 is 2703216.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (61230727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14026 + ... + 17865.

Almost surely, 2^61230720 is an apocalyptic number.

61230720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61230720 is an abundant number, since it is smaller than the sum of its proper divisors (133948320).

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

61230720 is a wasteful number, since it uses less digits than its factorization.

61230720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31913 (or 31901 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 61230720 is about 7825.0060702852. The cubic root of 61230720 is about 394.1453937021.

Adding to 61230720 its reverse (2703216), we get a palindrome (63933936).

The spelling of 61230720 in words is "sixty-one million, two hundred thirty thousand, seven hundred twenty".