400142167 has 4 divisors (see below), whose sum is σ = 400183000. Its totient is φ = 400101336.

The previous prime is 400142159. The next prime is 400142173. The reversal of 400142167 is 761241004.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a 3-Lehmer number, since φ(400142167) divides (400142167-1)³.

It is a cyclic number.

It is not a de Polignac number, because 400142167 - 2³ = 400142159 is a prime.

It is a super-2 number, since 2×400142167² = 320227507622911778, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400142177) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4084 + ... + 28582.

It is an arithmetic number, because the mean of its divisors is an integer number (100045750).

Almost surely, 2^400142167 is an apocalyptic number.

400142167 is the 16333-rd pentagonal number.

400142167 is a deficient number, since it is larger than the sum of its proper divisors (40833).

400142167 is a wasteful number, since it uses less digits than its factorization.

400142167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40832.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 400142167 is about 20003.5538592521. The cubic root of 400142167 is about 736.8935806728.

The spelling of 400142167 in words is "four hundred million, one hundred forty-two thousand, one hundred sixty-seven".