402042012 has 24 divisors (see below), whose sum is σ = 943014912. Its totient is φ = 133311600.

The previous prime is 402041977. The next prime is 402042019. The reversal of 402042012 is 210240204.

It is a junction number, because it is equal to n+sod(n) for n = 402041982 and 402042000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402042019) 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, 85414 + ... + 89997.

It is an arithmetic number, because the mean of its divisors is an integer number (39292288).

Almost surely, 2^402042012 is an apocalyptic number.

It is an amenable number.

402042012 is an abundant number, since it is smaller than the sum of its proper divisors (540972900).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

402042012 is a wasteful number, since it uses less digits than its factorization.

402042012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175609 (or 175607 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 402042012 is about 20050.9853124479. The cubic root of 402042012 is about 738.0579782742.

Adding to 402042012 its reverse (210240204), we get a palindrome (612282216).

The spelling of 402042012 in words is "four hundred two million, forty-two thousand, twelve".