1625115121 has 16 divisors (see below), whose sum is σ = 1867079808. Its totient is φ = 1385625600.

The previous prime is 1625115113. The next prime is 1625115131. The reversal of 1625115121 is 1215115261.

It is a cyclic number.

It is not a de Polignac number, because 1625115121 - 2³ = 1625115113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1625115101) 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, 1673166 + ... + 1674136.

It is an arithmetic number, because the mean of its divisors is an integer number (116692488).

Almost surely, 2^1625115121 is an apocalyptic number.

It is an amenable number.

1625115121 is a deficient number, since it is larger than the sum of its proper divisors (241964687).

1625115121 is an equidigital number, since it uses as much as digits as its factorization.

1625115121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1992.

The product of its digits is 600, while the sum is 25.

The square root of 1625115121 is about 40312.7166164723. The cubic root of 1625115121 is about 1175.6951060767.

The spelling of 1625115121 in words is "one billion, six hundred twenty-five million, one hundred fifteen thousand, one hundred twenty-one".