402131239 has 8 divisors (see below), whose sum is σ = 412414128. Its totient is φ = 391871040.

The previous prime is 402131237. The next prime is 402131267. The reversal of 402131239 is 932131204.

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

It is a cyclic number.

It is not a de Polignac number, because 402131239 - 2¹ = 402131237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402131237) 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, 33649 + ... + 44005.

It is an arithmetic number, because the mean of its divisors is an integer number (51551766).

Almost surely, 2^402131239 is an apocalyptic number.

402131239 is a deficient number, since it is larger than the sum of its proper divisors (10282889).

402131239 is a wasteful number, since it uses less digits than its factorization.

402131239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11345.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 402131239 is about 20053.2101918870. The cubic root of 402131239 is about 738.1125744159.

The spelling of 402131239 in words is "four hundred two million, one hundred thirty-one thousand, two hundred thirty-nine".