402142756 has 6 divisors (see below), whose sum is σ = 703749830. Its totient is φ = 201071376.

The previous prime is 402142729. The next prime is 402142781. The reversal of 402142756 is 657241204.

It can be written as a sum of positive squares in only one way, i.e., 232257600 + 169885156 = 15240^2 + 13034^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50267841 + ... + 50267848.

Almost surely, 2^402142756 is an apocalyptic number.

It is an amenable number.

402142756 is a deficient number, since it is larger than the sum of its proper divisors (301607074).

402142756 is a wasteful number, since it uses less digits than its factorization.

402142756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100535693 (or 100535691 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 402142756 is about 20053.4973508363. The cubic root of 402142756 is about 738.1196208397.

The spelling of 402142756 in words is "four hundred two million, one hundred forty-two thousand, seven hundred fifty-six".