399012142 has 8 divisors (see below), whose sum is σ = 624540816. Its totient is φ = 190831872.

The previous prime is 399012137. The next prime is 399012157. The reversal of 399012142 is 241210993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4337043 + ... + 4337134.

It is an arithmetic number, because the mean of its divisors is an integer number (78067602).

Almost surely, 2^399012142 is an apocalyptic number.

399012142 is a deficient number, since it is larger than the sum of its proper divisors (225528674).

399012142 is a wasteful number, since it uses less digits than its factorization.

399012142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8674202.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 399012142 is about 19975.2882832764. The cubic root of 399012142 is about 736.1992497228.

The spelling of 399012142 in words is "three hundred ninety-nine million, twelve thousand, one hundred forty-two".