400142 has 8 divisors (see below), whose sum is σ = 621000. Its totient is φ = 193144.

The previous prime is 400123. The next prime is 400151. The reversal of 400142 is 241004.

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

It is a super-2 number, since 2×400142² = 320227240328, which contains 22 as substring.

It is a congruent number.

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, 3392 + ... + 3507.

It is an arithmetic number, because the mean of its divisors is an integer number (77625).

2⁴⁰⁰¹⁴² is an apocalyptic number.

400142 is a deficient number, since it is larger than the sum of its proper divisors (220858).

400142 is a wasteful number, since it uses less digits than its factorization.

400142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6930.

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 400142 is about 632.5677829292. The cubic root of 400142 is about 73.6893478158.

Adding to 400142 its reverse (241004), we get a palindrome (641146).

The spelling of 400142 in words is "four hundred thousand, one hundred forty-two", and thus it is an iban number.