12623551 has 4 divisors (see below), whose sum is σ = 12689152. Its totient is φ = 12557952.

The previous prime is 12623521. The next prime is 12623557. The reversal of 12623551 is 15532621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12623551 - 2⁵ = 12623519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12623557) 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, 32511 + ... + 32896.

It is an arithmetic number, because the mean of its divisors is an integer number (3172288).

Almost surely, 2^12623551 is an apocalyptic number.

12623551 is a deficient number, since it is larger than the sum of its proper divisors (65601).

12623551 is an equidigital number, since it uses as much as digits as its factorization.

12623551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65600.

The product of its digits is 1800, while the sum is 25.

The square root of 12623551 is about 3552.9636924686. The cubic root of 12623551 is about 232.8415667896.

The spelling of 12623551 in words is "twelve million, six hundred twenty-three thousand, five hundred fifty-one".