70521025 has 24 divisors (see below), whose sum is σ = 90556704. Its totient is φ = 54441600.

The previous prime is 70520999. The next prime is 70521043. The reversal of 70521025 is 52012507.

It is a de Polignac number, because none of the positive numbers 2^k-70521025 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 70520987 and 70521005.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 109354 + ... + 109996.

It is an arithmetic number, because the mean of its divisors is an integer number (3773196).

Almost surely, 2^70521025 is an apocalyptic number.

It is an amenable number.

70521025 is a deficient number, since it is larger than the sum of its proper divisors (20035679).

70521025 is a wasteful number, since it uses less digits than its factorization.

70521025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 801 (or 796 counting only the distinct ones).

The product of its (nonzero) digits is 700, while the sum is 22.

The square root of 70521025 is about 8397.6797390708. The cubic root of 70521025 is about 413.1485237943.

The spelling of 70521025 in words is "seventy million, five hundred twenty-one thousand, twenty-five".