397812525 has 48 divisors (see below), whose sum is σ = 719953920. Its totient is φ = 192222400.

The previous prime is 397812523. The next prime is 397812539. The reversal of 397812525 is 525218793.

It is a happy number.

It is not a de Polignac number, because 397812525 - 2¹ = 397812523 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397812521) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 315346 + ... + 316604.

It is an arithmetic number, because the mean of its divisors is an integer number (14999040).

Almost surely, 2^397812525 is an apocalyptic number.

It is an amenable number.

397812525 is a deficient number, since it is larger than the sum of its proper divisors (322141395).

397812525 is a wasteful number, since it uses less digits than its factorization.

397812525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1666 (or 1661 counting only the distinct ones).

The product of its digits is 151200, while the sum is 42.

The square root of 397812525 is about 19945.2381535042. The cubic root of 397812525 is about 735.4607227586.

The spelling of 397812525 in words is "three hundred ninety-seven million, eight hundred twelve thousand, five hundred twenty-five".