397817125 has 8 divisors (see below), whose sum is σ = 496475928. Its totient is φ = 318253600.

The previous prime is 397817113. The next prime is 397817149. The reversal of 397817125 is 521718793.

It can be written as a sum of positive squares in 4 ways, for example, as 6687396 + 391129729 = 2586^2 + 19777^2 .

It is not a de Polignac number, because 397817125 - 2⁷ = 397816997 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 1591144 + ... + 1591393.

It is an arithmetic number, because the mean of its divisors is an integer number (62059491).

Almost surely, 2^397817125 is an apocalyptic number.

It is an amenable number.

397817125 is a deficient number, since it is larger than the sum of its proper divisors (98658803).

397817125 is an equidigital number, since it uses as much as digits as its factorization.

397817125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3182552 (or 3182542 counting only the distinct ones).

The product of its digits is 105840, while the sum is 43.

The square root of 397817125 is about 19945.3534689160. The cubic root of 397817125 is about 735.4635575163.

The spelling of 397817125 in words is "three hundred ninety-seven million, eight hundred seventeen thousand, one hundred twenty-five".