100021434 has 64 divisors (see below), whose sum is σ = 225884160. Its totient is φ = 29367360.

The previous prime is 100021429. The next prime is 100021447. The reversal of 100021434 is 434120001.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 96499 + ... + 97529.

It is an arithmetic number, because the mean of its divisors is an integer number (3529440).

Almost surely, 2^100021434 is an apocalyptic number.

100021434 is an abundant number, since it is smaller than the sum of its proper divisors (125862726).

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

100021434 is a wasteful number, since it uses less digits than its factorization.

100021434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1115.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 100021434 is about 10001.0716425791. The cubic root of 100021434 is about 464.1920435972.

Adding to 100021434 its reverse (434120001), we get a palindrome (534141435).

The spelling of 100021434 in words is "one hundred million, twenty-one thousand, four hundred thirty-four".