399125043 has 8 divisors (see below), whose sum is σ = 591296400. Its totient is φ = 266083344.

The previous prime is 399125021. The next prime is 399125101. The reversal of 399125043 is 340521993.

It is a happy number.

It is not a de Polignac number, because 399125043 - 2¹² = 399120947 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 399124989 and 399125007.

It is not an unprimeable number, because it can be changed into a prime (399125543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7391178 + ... + 7391231.

It is an arithmetic number, because the mean of its divisors is an integer number (73912050).

Almost surely, 2^399125043 is an apocalyptic number.

399125043 is a deficient number, since it is larger than the sum of its proper divisors (192171357).

399125043 is a wasteful number, since it uses less digits than its factorization.

399125043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14782418 (or 14782412 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 399125043 is about 19978.1141001847. The cubic root of 399125043 is about 736.2686793504.

The spelling of 399125043 in words is "three hundred ninety-nine million, one hundred twenty-five thousand, forty-three".