1625417621 has 8 divisors (see below), whose sum is σ = 1662211584. Its totient is φ = 1588850640.

The previous prime is 1625417597. The next prime is 1625417623. The reversal of 1625417621 is 1267145261.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1625417621 - 2⁶ = 1625417557 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 (1625417623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42221 + ... + 70946.

It is an arithmetic number, because the mean of its divisors is an integer number (207776448).

Almost surely, 2^1625417621 is an apocalyptic number.

It is an amenable number.

1625417621 is a deficient number, since it is larger than the sum of its proper divisors (36793963).

1625417621 is a wasteful number, since it uses less digits than its factorization.

1625417621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113491.

The product of its digits is 20160, while the sum is 35.

The square root of 1625417621 is about 40316.4683597162. The cubic root of 1625417621 is about 1175.7680497716.

The spelling of 1625417621 in words is "one billion, six hundred twenty-five million, four hundred seventeen thousand, six hundred twenty-one".