3997525 has 24 divisors (see below), whose sum is σ = 5785344. Its totient is φ = 2683200.

The previous prime is 3997507. The next prime is 3997547. The reversal of 3997525 is 5257993.

It is not a de Polignac number, because 3997525 - 2⁵ = 3997493 is a prime.

It is a super-2 number, since 2×3997525² = 31960412251250, which contains 22 as substring.

It is a Duffinian number.

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, 9060 + ... + 9490.

It is an arithmetic number, because the mean of its divisors is an integer number (241056).

Almost surely, 2^3997525 is an apocalyptic number.

3997525 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3997525 is a deficient number, since it is larger than the sum of its proper divisors (1787819).

3997525 is a wasteful number, since it uses less digits than its factorization.

3997525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501 (or 496 counting only the distinct ones).

The product of its digits is 85050, while the sum is 40.

The square root of 3997525 is about 1999.3811542575. The cubic root of 3997525 is about 158.7073582951.

It can be divided in two parts, 39975 and 25, that added together give a square (40000 = 200²).

The spelling of 3997525 in words is "three million, nine hundred ninety-seven thousand, five hundred twenty-five".