64042520 has 32 divisors (see below), whose sum is σ = 144475920. Its totient is φ = 25549440.

The previous prime is 64042513. The next prime is 64042543. The reversal of 64042520 is 2524046.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14939 + ... + 18741.

Almost surely, 2^64042520 is an apocalyptic number.

It is an amenable number.

64042520 is an abundant number, since it is smaller than the sum of its proper divisors (80433400).

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

64042520 is a wasteful number, since it uses less digits than its factorization.

64042520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4235 (or 4231 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 64042520 is about 8002.6570587524. The cubic root of 64042520 is about 400.0885637231.

Adding to 64042520 its reverse (2524046), we get a palindrome (66566566).

The spelling of 64042520 in words is "sixty-four million, forty-two thousand, five hundred twenty".