402774131 has 4 divisors (see below), whose sum is σ = 404533200. Its totient is φ = 401015064.

The previous prime is 402774121. The next prime is 402774133. The reversal of 402774131 is 131477204.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 402774131 - 2²² = 398579827 is a prime.

It is a super-2 number, since 2×402774131² = 324454001205610322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 402774094 and 402774103.

It is not an unprimeable number, because it can be changed into a prime (402774133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 879191 + ... + 879648.

It is an arithmetic number, because the mean of its divisors is an integer number (101133300).

Almost surely, 2^402774131 is an apocalyptic number.

402774131 is a deficient number, since it is larger than the sum of its proper divisors (1759069).

402774131 is a wasteful number, since it uses less digits than its factorization.

402774131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1759068.

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 402774131 is about 20069.2334432584. The cubic root of 402774131 is about 738.5057081083.

The spelling of 402774131 in words is "four hundred two million, seven hundred seventy-four thousand, one hundred thirty-one".