1521481873 has 2 divisors, whose sum is σ = 1521481874. Its totient is φ = 1521481872.

The previous prime is 1521481853. The next prime is 1521481883. The reversal of 1521481873 is 3781841251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 871843729 + 649638144 = 29527^2 + 25488^2 .

It is a cyclic number.

It is not a de Polignac number, because 1521481873 - 2²⁹ = 984610961 is a prime.

It is not a weakly prime, because it can be changed into another prime (1521481823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 760740936 + 760740937.

It is an arithmetic number, because the mean of its divisors is an integer number (760740937).

Almost surely, 2^1521481873 is an apocalyptic number.

It is an amenable number.

1521481873 is a deficient number, since it is larger than the sum of its proper divisors (1).

1521481873 is an equidigital number, since it uses as much as digits as its factorization.

1521481873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 53760, while the sum is 40.

The square root of 1521481873 is about 39006.1773697449. The cubic root of 1521481873 is about 1150.1529407178.

The spelling of 1521481873 in words is "one billion, five hundred twenty-one million, four hundred eighty-one thousand, eight hundred seventy-three".