402340251 has 8 divisors (see below), whose sum is σ = 538350400. Its totient is φ = 267278472.

The previous prime is 402340243. The next prime is 402340261. The reversal of 402340251 is 152043204.

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

It is not a de Polignac number, because 402340251 - 2³ = 402340243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402340231) 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, 236101 + ... + 237798.

It is an arithmetic number, because the mean of its divisors is an integer number (67293800).

Almost surely, 2^402340251 is an apocalyptic number.

402340251 is a deficient number, since it is larger than the sum of its proper divisors (136010149).

402340251 is a wasteful number, since it uses less digits than its factorization.

402340251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474185.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 402340251 is about 20058.4209498156. The cubic root of 402340251 is about 738.2404328939.

Adding to 402340251 its reverse (152043204), we get a palindrome (554383455).

The spelling of 402340251 in words is "four hundred two million, three hundred forty thousand, two hundred fifty-one".