970721525 has 12 divisors (see below), whose sum is σ = 1207987044. Its totient is φ = 773808000.

The previous prime is 970721519. The next prime is 970721593. The reversal of 970721525 is 525127079.

It can be written as a sum of positive squares in 6 ways, for example, as 26142769 + 944578756 = 5113^2 + 30734^2 .

It is not a de Polignac number, because 970721525 - 2¹⁰ = 970720501 is a prime.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 62066 + ... + 76115.

It is an arithmetic number, because the mean of its divisors is an integer number (100665587).

Almost surely, 2^970721525 is an apocalyptic number.

It is an amenable number.

970721525 is a deficient number, since it is larger than the sum of its proper divisors (237265519).

970721525 is a wasteful number, since it uses less digits than its factorization.

970721525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138472 (or 138467 counting only the distinct ones).

The product of its (nonzero) digits is 44100, while the sum is 38.

The square root of 970721525 is about 31156.4042373314. The cubic root of 970721525 is about 990.1436804694.

The spelling of 970721525 in words is "nine hundred seventy million, seven hundred twenty-one thousand, five hundred twenty-five".