624601121 has 4 divisors (see below), whose sum is σ = 624664644. Its totient is φ = 624537600.

The previous prime is 624601111. The next prime is 624601127. The reversal of 624601121 is 121106426.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 73290721 + 551310400 = 8561^2 + 23480^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-624601121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (624601127) 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, 13520 + ... + 37841.

It is an arithmetic number, because the mean of its divisors is an integer number (156166161).

Almost surely, 2^624601121 is an apocalyptic number.

It is an amenable number.

624601121 is a deficient number, since it is larger than the sum of its proper divisors (63523).

624601121 is a wasteful number, since it uses less digits than its factorization.

624601121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63522.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 624601121 is about 24992.0211467580. The cubic root of 624601121 is about 854.8060483655.

Adding to 624601121 its reverse (121106426), we get a palindrome (745707547).

The spelling of 624601121 in words is "six hundred twenty-four million, six hundred one thousand, one hundred twenty-one".