1525240812 has 12 divisors (see below), whose sum is σ = 3558895256. Its totient is φ = 508413600.

The previous prime is 1525240811. The next prime is 1525240817. The reversal of 1525240812 is 2180425251.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 1525240812.

It is not an unprimeable number, because it can be changed into a prime (1525240811) 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, 63551689 + ... + 63551712.

Almost surely, 2^1525240812 is an apocalyptic number.

1525240812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1525240812 is an abundant number, since it is smaller than the sum of its proper divisors (2033654444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1525240812 is a wasteful number, since it uses less digits than its factorization.

1525240812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127103408 (or 127103406 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 30.

The square root of 1525240812 is about 39054.3315395360. The cubic root of 1525240812 is about 1151.0993424476.

The spelling of 1525240812 in words is "one billion, five hundred twenty-five million, two hundred forty thousand, eight hundred twelve".