1520865225 has 72 divisors (see below), whose sum is σ = 3100997952. Its totient is φ = 705302400.

The previous prime is 1520865217. The next prime is 1520865251. The reversal of 1520865225 is 5225680251.

It is a happy number.

1520865225 is a `hidden beast` number, since 1 + 52 + 0 + 86 + 522 + 5 = 666.

1520865225 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 1520865225 - 2³ = 1520865217 is a prime.

It is a super-2 number, since 2×1520865225² = 4626062065228601250, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1520865225.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 43567 + ... + 70283.

It is an arithmetic number, because the mean of its divisors is an integer number (43069416).

Almost surely, 2^1520865225 is an apocalyptic number.

1520865225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1520865225 is an abundant number, since it is smaller than the sum of its proper divisors (1580132727).

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

1520865225 is a wasteful number, since it uses less digits than its factorization.

1520865225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26767 (or 26759 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 36.

The square root of 1520865225 is about 38998.2720771062. The cubic root of 1520865225 is about 1149.9975362266.

The spelling of 1520865225 in words is "one billion, five hundred twenty million, eight hundred sixty-five thousand, two hundred twenty-five".