100123240 has 32 divisors (see below), whose sum is σ = 257460480. Its totient is φ = 34327872.

The previous prime is 100123237. The next prime is 100123241. The reversal of 100123240 is 42321001.

It is a self number, because there is not a number n which added to its sum of digits gives 100123240.

It is not an unprimeable number, because it can be changed into a prime (100123241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178512 + ... + 179071.

It is an arithmetic number, because the mean of its divisors is an integer number (8045640).

Almost surely, 2^100123240 is an apocalyptic number.

100123240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100123240 is an abundant number, since it is smaller than the sum of its proper divisors (157337240).

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

100123240 is a wasteful number, since it uses less digits than its factorization.

100123240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357601 (or 357597 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 100123240 is about 10006.1601026568. The cubic root of 100123240 is about 464.3494815543.

Adding to 100123240 its reverse (42321001), we get a palindrome (142444241).

The spelling of 100123240 in words is "one hundred million, one hundred twenty-three thousand, two hundred forty".