12554621 has 4 divisors (see below), whose sum is σ = 12620544. Its totient is φ = 12488700.

The previous prime is 12554579. The next prime is 12554623. The reversal of 12554621 is 12645521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12645521 = 7 ⋅1806503.

It is a cyclic number.

It is not a de Polignac number, because 12554621 - 2⁶ = 12554557 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 (12554623) 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, 32675 + ... + 33056.

It is an arithmetic number, because the mean of its divisors is an integer number (3155136).

Almost surely, 2^12554621 is an apocalyptic number.

It is an amenable number.

12554621 is a deficient number, since it is larger than the sum of its proper divisors (65923).

12554621 is an equidigital number, since it uses as much as digits as its factorization.

12554621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65922.

The product of its digits is 2400, while the sum is 26.

The square root of 12554621 is about 3543.2500617371. The cubic root of 12554621 is about 232.4169881319.

The spelling of 12554621 in words is "twelve million, five hundred fifty-four thousand, six hundred twenty-one".