400000142 has 16 divisors (see below), whose sum is σ = 609869520. Its totient is φ = 196725312.

The previous prime is 400000109. The next prime is 400000151. The reversal of 400000142 is 241000004.

It is a super-2 number, since 2×400000142² = 320000227200040328, 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 7 ways as a sum of consecutive naturals, for example, 53273 + ... + 60315.

It is an arithmetic number, because the mean of its divisors is an integer number (38116845).

Almost surely, 2^400000142 is an apocalyptic number.

400000142 is a deficient number, since it is larger than the sum of its proper divisors (209869378).

400000142 is a wasteful number, since it uses less digits than its factorization.

400000142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7507.

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

The square root of 400000142 is about 20000.0035499997. The cubic root of 400000142 is about 736.8063869168.

Adding to 400000142 its reverse (241000004), we get a palindrome (641000146).

The spelling of 400000142 in words is "four hundred million, one hundred forty-two", and thus it is an aban number.