402005012 has 6 divisors (see below), whose sum is σ = 703508778. Its totient is φ = 201002504.

The previous prime is 402005003. The next prime is 402005027. The reversal of 402005012 is 210500204.

It can be written as a sum of positive squares in only one way, i.e., 336135556 + 65869456 = 18334^2 + 8116^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50250623 + ... + 50250630.

It is an arithmetic number, because the mean of its divisors is an integer number (117251463).

Almost surely, 2^402005012 is an apocalyptic number.

It is an amenable number.

402005012 is a deficient number, since it is larger than the sum of its proper divisors (301503766).

402005012 is a wasteful number, since it uses less digits than its factorization.

402005012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100501257 (or 100501255 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 402005012 is about 20050.0626432937. The cubic root of 402005012 is about 738.0353363759.

Adding to 402005012 its reverse (210500204), we get a palindrome (612505216).

The spelling of 402005012 in words is "four hundred two million, five thousand, twelve".