401686742 has 4 divisors (see below), whose sum is σ = 602530116. Its totient is φ = 200843370.

The previous prime is 401686729. The next prime is 401686783. The reversal of 401686742 is 247686104.

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

It is a super-2 number, since 2×401686742² = 322704477397149128, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 401686696 and 401686705.

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, 100421684 + ... + 100421687.

It is an arithmetic number, because the mean of its divisors is an integer number (150632529).

Almost surely, 2^401686742 is an apocalyptic number.

401686742 is a deficient number, since it is larger than the sum of its proper divisors (200843374).

401686742 is a wasteful number, since it uses less digits than its factorization.

401686742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200843373.

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 401686742 is about 20042.1241888179. The cubic root of 401686742 is about 737.8405158174.

The spelling of 401686742 in words is "four hundred one million, six hundred eighty-six thousand, seven hundred forty-two".