12555101 has 4 divisors (see below), whose sum is σ = 13520892. Its totient is φ = 11589312.

The previous prime is 12555083. The next prime is 12555107. The reversal of 12555101 is 10155521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10155521 = 1787 ⋅5683.

It can be written as a sum of positive squares in 2 ways, for example, as 6300100 + 6255001 = 2510^2 + 2501^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12555101 is a prime.

It is a super-2 number, since 2×12555101² = 315261122240402, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12555107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 482876 + ... + 482901.

It is an arithmetic number, because the mean of its divisors is an integer number (3380223).

Almost surely, 2^12555101 is an apocalyptic number.

It is an amenable number.

12555101 is a deficient number, since it is larger than the sum of its proper divisors (965791).

12555101 is an equidigital number, since it uses as much as digits as its factorization.

12555101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 965790.

The product of its (nonzero) digits is 250, while the sum is 20.

The square root of 12555101 is about 3543.3177955131. The cubic root of 12555101 is about 232.4199500887.

The spelling of 12555101 in words is "twelve million, five hundred fifty-five thousand, one hundred one".