12755531 has 4 divisors (see below), whose sum is σ = 12764352. Its totient is φ = 12746712.

The previous prime is 12755521. The next prime is 12755537. The reversal of 12755531 is 13555721.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12755531 is a prime.

It is a super-2 number, since 2×12755531² = 325407142183922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12755494 and 12755503.

It is not an unprimeable number, because it can be changed into a prime (12755537) 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, 1676 + ... + 5321.

It is an arithmetic number, because the mean of its divisors is an integer number (3191088).

Almost surely, 2^12755531 is an apocalyptic number.

12755531 is a deficient number, since it is larger than the sum of its proper divisors (8821).

12755531 is an equidigital number, since it uses as much as digits as its factorization.

12755531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8820.

The product of its digits is 5250, while the sum is 29.

The square root of 12755531 is about 3571.4886252094. The cubic root of 12755531 is about 233.6502127762.

The spelling of 12755531 in words is "twelve million, seven hundred fifty-five thousand, five hundred thirty-one".