401812942 has 4 divisors (see below), whose sum is σ = 602719416. Its totient is φ = 200906470.

The previous prime is 401812909. The next prime is 401812987. The reversal of 401812942 is 249218104.

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

It is a super-2 number, since 2×401812942² = 322907280717390728, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100453234 + ... + 100453237.

It is an arithmetic number, because the mean of its divisors is an integer number (150679854).

Almost surely, 2^401812942 is an apocalyptic number.

401812942 is a deficient number, since it is larger than the sum of its proper divisors (200906474).

401812942 is a wasteful number, since it uses less digits than its factorization.

401812942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200906473.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 401812942 is about 20045.2723104477. The cubic root of 401812942 is about 737.9177781162.

The spelling of 401812942 in words is "four hundred one million, eight hundred twelve thousand, nine hundred forty-two".