400401142 has 8 divisors (see below), whose sum is σ = 600889176. Its totient is φ = 200104752.

The previous prime is 400401137. The next prime is 400401191. The reversal of 400401142 is 241104004.

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

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 in 3 ways as a sum of consecutive naturals, for example, 42568 + ... + 51115.

It is an arithmetic number, because the mean of its divisors is an integer number (75111147).

Almost surely, 2^400401142 is an apocalyptic number.

400401142 is a deficient number, since it is larger than the sum of its proper divisors (200488034).

400401142 is a wasteful number, since it uses less digits than its factorization.

400401142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95822.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 400401142 is about 20010.0260369646. The cubic root of 400401142 is about 737.0525207323.

Adding to 400401142 its reverse (241104004), we get a palindrome (641505146).

The spelling of 400401142 in words is "four hundred million, four hundred one thousand, one hundred forty-two".