7981525 has 24 divisors (see below), whose sum is σ = 10434600. Its totient is φ = 6048000.

The previous prime is 7981513. The next prime is 7981537. The reversal of 7981525 is 5251897.

7981525 = T₁₇₄ + T₁₇₅ + ... + T₃₇₅.

It is an interprime number because it is at equal distance from previous prime (7981513) and next prime (7981537).

It can be written as a sum of positive squares in 12 ways, for example, as 130321 + 7851204 = 361^2 + 2802^2 .

It is not a de Polignac number, because 7981525 - 2⁷ = 7981397 is a prime.

It is a congruent number.

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, 73171 + ... + 73279.

It is an arithmetic number, because the mean of its divisors is an integer number (434775).

Almost surely, 2^7981525 is an apocalyptic number.

It is an amenable number.

7981525 is a deficient number, since it is larger than the sum of its proper divisors (2453075).

7981525 is a wasteful number, since it uses less digits than its factorization.

7981525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249 (or 244 counting only the distinct ones).

The product of its digits is 25200, while the sum is 37.

The square root of 7981525 is about 2825.1592875447. The cubic root of 7981525 is about 199.8459229985.

The spelling of 7981525 in words is "seven million, nine hundred eighty-one thousand, five hundred twenty-five".