397509525 has 120 divisors (see below), whose sum is σ = 871432320. Its totient is φ = 175271040.

The previous prime is 397509499. The next prime is 397509547. The reversal of 397509525 is 525905793.

397509525 is a `hidden beast` number, since 3 + 97 + 509 + 52 + 5 = 666.

It is not a de Polignac number, because 397509525 - 2⁷ = 397509397 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 410592 + ... + 411558.

It is an arithmetic number, because the mean of its divisors is an integer number (7261936).

Almost surely, 2^397509525 is an apocalyptic number.

397509525 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

397509525 is an abundant number, since it is smaller than the sum of its proper divisors (473922795).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

397509525 is a wasteful number, since it uses less digits than its factorization.

397509525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025 (or 1011 counting only the distinct ones).

The product of its (nonzero) digits is 425250, while the sum is 45.

The square root of 397509525 is about 19937.6409085930. The cubic root of 397509525 is about 735.2739503582.

The spelling of 397509525 in words is "three hundred ninety-seven million, five hundred nine thousand, five hundred twenty-five".