65252639 has 4 divisors (see below), whose sum is σ = 67502760. Its totient is φ = 63002520.

The previous prime is 65252623. The next prime is 65252651. The reversal of 65252639 is 93625256.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 65252639 - 2⁴ = 65252623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65252609) 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 3 ways as a sum of consecutive naturals, for example, 1125017 + ... + 1125074.

It is an arithmetic number, because the mean of its divisors is an integer number (16875690).

Almost surely, 2^65252639 is an apocalyptic number.

65252639 is a deficient number, since it is larger than the sum of its proper divisors (2250121).

65252639 is a wasteful number, since it uses less digits than its factorization.

65252639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2250120.

The product of its digits is 97200, while the sum is 38.

The square root of 65252639 is about 8077.9105590493. The cubic root of 65252639 is about 402.5928214613.

The spelling of 65252639 in words is "sixty-five million, two hundred fifty-two thousand, six hundred thirty-nine".