400100142 has 16 divisors (see below), whose sum is σ = 861754320. Its totient is φ = 123107712.

The previous prime is 400100033. The next prime is 400100171. The reversal of 400100142 is 241001004.

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, 2564667 + ... + 2564822.

It is an arithmetic number, because the mean of its divisors is an integer number (53859645).

Almost surely, 2^400100142 is an apocalyptic number.

400100142 is an abundant number, since it is smaller than the sum of its proper divisors (461654178).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400100142 is a wasteful number, since it uses less digits than its factorization.

400100142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5129507.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 400100142 is about 20002.5033933255. The cubic root of 400100142 is about 736.8677823113.

Adding to 400100142 its reverse (241001004), we get a palindrome (641101146).

The spelling of 400100142 in words is "four hundred million, one hundred thousand, one hundred forty-two".