12554721 has 24 divisors (see below), whose sum is σ = 19828224. Its totient is φ = 7620480.

The previous prime is 12554701. The next prime is 12554723. The reversal of 12554721 is 12745521.

It is not a de Polignac number, because 12554721 - 2⁶ = 12554657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12554723) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3420 + ... + 6066.

It is an arithmetic number, because the mean of its divisors is an integer number (826176).

Almost surely, 2^12554721 is an apocalyptic number.

It is an amenable number.

12554721 is a deficient number, since it is larger than the sum of its proper divisors (7273503).

12554721 is a wasteful number, since it uses less digits than its factorization.

12554721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2701 (or 2698 counting only the distinct ones).

The product of its digits is 2800, while the sum is 27.

The square root of 12554721 is about 3543.2641730472. The cubic root of 12554721 is about 232.4176052125.

The spelling of 12554721 in words is "twelve million, five hundred fifty-four thousand, seven hundred twenty-one".