1521012425 has 12 divisors (see below), whose sum is σ = 1968058560. Its totient is φ = 1163904720.

The previous prime is 1521012421. The next prime is 1521012443. The reversal of 1521012425 is 5242101251.

1521012425 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1521012425 - 2² = 1521012421 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a self number, because there is not a number n which added to its sum of digits gives 1521012425.

It is not an unprimeable number, because it can be changed into a prime (1521012421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1322045 + ... + 1323194.

It is an arithmetic number, because the mean of its divisors is an integer number (164004880).

Almost surely, 2^1521012425 is an apocalyptic number.

It is an amenable number.

1521012425 is a deficient number, since it is larger than the sum of its proper divisors (447046135).

1521012425 is a wasteful number, since it uses less digits than its factorization.

1521012425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2645272 (or 2645267 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 1521012425 is about 39000.1592945465. The cubic root of 1521012425 is about 1150.0346366379.

Adding to 1521012425 its reverse (5242101251), we get a palindrome (6763113676).

The spelling of 1521012425 in words is "one billion, five hundred twenty-one million, twelve thousand, four hundred twenty-five".