1523925121 has 4 divisors (see below), whose sum is σ = 1528447492. Its totient is φ = 1519402752.

The previous prime is 1523925079. The next prime is 1523925127. The reversal of 1523925121 is 1215293251.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 883278400 + 640646721 = 29720^2 + 25311^2 .

It is a cyclic number.

It is not a de Polignac number, because 1523925121 - 2¹¹ = 1523923073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1523925127) 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, 2260680 + ... + 2261353.

It is an arithmetic number, because the mean of its divisors is an integer number (382111873).

Almost surely, 2^1523925121 is an apocalyptic number.

It is an amenable number.

1523925121 is a deficient number, since it is larger than the sum of its proper divisors (4522371).

1523925121 is an equidigital number, since it uses as much as digits as its factorization.

1523925121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4522370.

The product of its digits is 5400, while the sum is 31.

The square root of 1523925121 is about 39037.4835382610. The cubic root of 1523925121 is about 1150.7682632032.

The spelling of 1523925121 in words is "one billion, five hundred twenty-three million, nine hundred twenty-five thousand, one hundred twenty-one".