681501052 has 12 divisors (see below), whose sum is σ = 1200526096. Its totient is φ = 338493600.

The previous prime is 681501043. The next prime is 681501071. The reversal of 681501052 is 250105186.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 681501052.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 563553 + ... + 564760.

Almost surely, 2^681501052 is an apocalyptic number.

It is an amenable number.

681501052 is a deficient number, since it is larger than the sum of its proper divisors (519025044).

681501052 is a wasteful number, since it uses less digits than its factorization.

681501052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1128468 (or 1128466 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 28.

The square root of 681501052 is about 26105.5751133738. The cubic root of 681501052 is about 880.0125049876.

The spelling of 681501052 in words is "six hundred eighty-one million, five hundred one thousand, fifty-two".