64865142 has 12 divisors (see below), whose sum is σ = 140541180. Its totient is φ = 21621708.

The previous prime is 64865093. The next prime is 64865147. The reversal of 64865142 is 24156846.

64865142 is a `hidden beast` number, since 64 + 86 + 514 + 2 = 666.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 64865097 and 64865106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64865147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1801792 + ... + 1801827.

It is an arithmetic number, because the mean of its divisors is an integer number (11711765).

Almost surely, 2^64865142 is an apocalyptic number.

64865142 is an abundant number, since it is smaller than the sum of its proper divisors (75676038).

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

64865142 is a wasteful number, since it uses less digits than its factorization.

64865142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3603627 (or 3603624 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 64865142 is about 8053.8898676354. The cubic root of 64865142 is about 401.7943181870.

It can be divided in two parts, 6486 and 5142, that added together give a triangular number (11628 = T₁₅₂).

The spelling of 64865142 in words is "sixty-four million, eight hundred sixty-five thousand, one hundred forty-two".