100725281 has 8 divisors (see below), whose sum is σ = 103123584. Its totient is φ = 98345520.

The previous prime is 100725241. The next prime is 100725283. The reversal of 100725281 is 182527001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 100725281 - 2¹⁰ = 100724257 is a prime.

It is a super-2 number, since 2×100725281² = 20291164465057922, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 100725281.

It is not an unprimeable number, because it can be changed into a prime (100725283) 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, 6680 + ... + 15686.

It is an arithmetic number, because the mean of its divisors is an integer number (12890448).

Almost surely, 2^100725281 is an apocalyptic number.

It is an amenable number.

100725281 is a deficient number, since it is larger than the sum of its proper divisors (2398303).

100725281 is an equidigital number, since it uses as much as digits as its factorization.

100725281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9271.

The product of its (nonzero) digits is 1120, while the sum is 26.

The square root of 100725281 is about 10036.1985333093. The cubic root of 100725281 is about 465.2783333850.

The spelling of 100725281 in words is "one hundred million, seven hundred twenty-five thousand, two hundred eighty-one".