100400142 has 16 divisors (see below), whose sum is σ = 211368960. Its totient is φ = 31705272.

The previous prime is 100400137. The next prime is 100400173. The reversal of 100400142 is 241004001.

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, 440238 + ... + 440465.

It is an arithmetic number, because the mean of its divisors is an integer number (13210560).

Almost surely, 2^100400142 is an apocalyptic number.

100400142 is an abundant number, since it is smaller than the sum of its proper divisors (110968818).

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

100400142 is a wasteful number, since it uses less digits than its factorization.

100400142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 880727.

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

The square root of 100400142 is about 10019.9871257402. The cubic root of 100400142 is about 464.7771576478. Note that the first 3 decimals are identical.

Adding to 100400142 its reverse (241004001), we get a palindrome (341404143).

The spelling of 100400142 in words is "one hundred million, four hundred thousand, one hundred forty-two".