401689042 has 8 divisors (see below), whose sum is σ = 602959500. Its totient is φ = 200702544.

The previous prime is 401689037. The next prime is 401689061. The reversal of 401689042 is 240986104.

It can be written as a sum of positive squares in 2 ways, for example, as 312971481 + 88717561 = 17691^2 + 9419^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×401689042² = 322708172925755528, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 401688989 and 401689007.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67417 + ... + 73132.

Almost surely, 2^401689042 is an apocalyptic number.

401689042 is a deficient number, since it is larger than the sum of its proper divisors (201270458).

401689042 is a wasteful number, since it uses less digits than its factorization.

401689042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141980.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 401689042 is about 20042.1815678833. The cubic root of 401689042 is about 737.8419240706.

The spelling of 401689042 in words is "four hundred one million, six hundred eighty-nine thousand, forty-two".