394015925 has 12 divisors (see below), whose sum is σ = 493065540. Its totient is φ = 312318720.

The previous prime is 394015907. The next prime is 394015943. The reversal of 394015925 is 529510493.

It is an interprime number because it is at equal distance from previous prime (394015907) and next prime (394015943).

It can be written as a sum of positive squares in 6 ways, for example, as 28976689 + 365039236 = 5383^2 + 19106^2 .

It is not a de Polignac number, because 394015925 - 2⁶ = 394015861 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69572 + ... + 75021.

It is an arithmetic number, because the mean of its divisors is an integer number (41088795).

Almost surely, 2^394015925 is an apocalyptic number.

It is an amenable number.

394015925 is a deficient number, since it is larger than the sum of its proper divisors (99049615).

394015925 is a wasteful number, since it uses less digits than its factorization.

394015925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144712 (or 144707 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 38.

The square root of 394015925 is about 19849.8343821806. The cubic root of 394015925 is about 733.1135699382.

The spelling of 394015925 in words is "three hundred ninety-four million, fifteen thousand, nine hundred twenty-five".