654252621 has 16 divisors (see below), whose sum is σ = 974852928. Its totient is φ = 386844800.

The previous prime is 654252589. The next prime is 654252623. The reversal of 654252621 is 126252456.

It is a cyclic number.

It is not a de Polignac number, because 654252621 - 2⁵ = 654252589 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (654252623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 240426 + ... + 243131.

It is an arithmetic number, because the mean of its divisors is an integer number (60928308).

Almost surely, 2^654252621 is an apocalyptic number.

It is an amenable number.

654252621 is a deficient number, since it is larger than the sum of its proper divisors (320600307).

654252621 is a wasteful number, since it uses less digits than its factorization.

654252621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483612.

The product of its digits is 28800, while the sum is 33.

The square root of 654252621 is about 25578.3623596195. The cubic root of 654252621 is about 868.1241217342.

The spelling of 654252621 in words is "six hundred fifty-four million, two hundred fifty-two thousand, six hundred twenty-one".