1621054625 has 16 divisors (see below), whose sum is σ = 2025319296. Its totient is φ = 1295406000.

The previous prime is 1621054621. The next prime is 1621054663. The reversal of 1621054625 is 5264501261.

It is not a de Polignac number, because 1621054625 - 2² = 1621054621 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1621054591 and 1621054600.

It is not an unprimeable number, because it can be changed into a prime (1621054621) 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, 114170 + ... + 127580.

It is an arithmetic number, because the mean of its divisors is an integer number (126582456).

Almost surely, 2^1621054625 is an apocalyptic number.

It is an amenable number.

1621054625 is a deficient number, since it is larger than the sum of its proper divisors (404264671).

1621054625 is an equidigital number, since it uses as much as digits as its factorization.

1621054625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14393 (or 14383 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 1621054625 is about 40262.3226478553. The cubic root of 1621054625 is about 1174.7150961577.

Adding to 1621054625 its reverse (5264501261), we get a palindrome (6885555886).

The spelling of 1621054625 in words is "one billion, six hundred twenty-one million, fifty-four thousand, six hundred twenty-five".