621123825 has 24 divisors (see below), whose sum is σ = 1173629248. Its totient is φ = 283942080.

The previous prime is 621123821. The next prime is 621123829. The reversal of 621123825 is 528321126.

It is an interprime number because it is at equal distance from previous prime (621123821) and next prime (621123829).

It is not a de Polignac number, because 621123825 - 2² = 621123821 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 621123792 and 621123801.

It is not an unprimeable number, because it can be changed into a prime (621123821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 591022 + ... + 592071.

Almost surely, 2^621123825 is an apocalyptic number.

It is an amenable number.

621123825 is a deficient number, since it is larger than the sum of its proper divisors (552505423).

621123825 is a wasteful number, since it uses less digits than its factorization.

621123825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1183113 (or 1183108 counting only the distinct ones).

The product of its digits is 5760, while the sum is 30.

The square root of 621123825 is about 24922.3559279615. The cubic root of 621123825 is about 853.2167957954.

The spelling of 621123825 in words is "six hundred twenty-one million, one hundred twenty-three thousand, eight hundred twenty-five".