100712240 has 20 divisors (see below), whose sum is σ = 234156144. Its totient is φ = 40284864.

The previous prime is 100712231. The next prime is 100712263. The reversal of 100712240 is 42217001.

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 629372 + ... + 629531.

Almost surely, 2^100712240 is an apocalyptic number.

100712240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100712240 is an abundant number, since it is smaller than the sum of its proper divisors (133443904).

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

100712240 is a wasteful number, since it uses less digits than its factorization.

100712240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1258916 (or 1258910 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 100712240 is about 10035.5488140908. The cubic root of 100712240 is about 465.2582525057.

Adding to 100712240 its reverse (42217001), we get a palindrome (142929241).

The spelling of 100712240 in words is "one hundred million, seven hundred twelve thousand, two hundred forty".