1245025520 has 40 divisors (see below), whose sum is σ = 2901022656. Its totient is φ = 496919808.

The previous prime is 1245025517. The next prime is 1245025603. The reversal of 1245025520 is 255205421.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 1245025520.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20234 + ... + 53846.

Almost surely, 2^1245025520 is an apocalyptic number.

1245025520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1245025520 is an abundant number, since it is smaller than the sum of its proper divisors (1655997136).

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

1245025520 is a wasteful number, since it uses less digits than its factorization.

1245025520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34089 (or 34083 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 1245025520 is about 35284.9191581899. The cubic root of 1245025520 is about 1075.7864862896.

The spelling of 1245025520 in words is "one billion, two hundred forty-five million, twenty-five thousand, five hundred twenty".