925398521 has 4 divisors (see below), whose sum is σ = 925606500. Its totient is φ = 925190544.

The previous prime is 925398511. The next prime is 925398533. The reversal of 925398521 is 125893529.

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

It can be written as a sum of positive squares in 2 ways, for example, as 266962921 + 658435600 = 16339^2 + 25660^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-925398521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (925398511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97166 + ... + 106263.

It is an arithmetic number, because the mean of its divisors is an integer number (231401625).

Almost surely, 2^925398521 is an apocalyptic number.

It is an amenable number.

925398521 is a deficient number, since it is larger than the sum of its proper divisors (207979).

925398521 is a wasteful number, since it uses less digits than its factorization.

925398521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207978.

The product of its digits is 194400, while the sum is 44.

The square root of 925398521 is about 30420.3635908580. The cubic root of 925398521 is about 974.4874872941.

The spelling of 925398521 in words is "nine hundred twenty-five million, three hundred ninety-eight thousand, five hundred twenty-one".