100581420 has 48 divisors (see below), whose sum is σ = 282498048. Its totient is φ = 26738880.

The previous prime is 100581419. The next prime is 100581431. The reversal of 100581420 is 24185001.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18405 + ... + 23235.

It is an arithmetic number, because the mean of its divisors is an integer number (5885376).

Almost surely, 2^100581420 is an apocalyptic number.

100581420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100581420 is an abundant number, since it is smaller than the sum of its proper divisors (181916628).

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

100581420 is a wasteful number, since it uses less digits than its factorization.

100581420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5190 (or 5188 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 100581420 is about 10029.0288662462. The cubic root of 100581420 is about 465.0567164026.

The spelling of 100581420 in words is "one hundred million, five hundred eighty-one thousand, four hundred twenty".