1520745120 has 72 divisors (see below), whose sum is σ = 5189547636. Its totient is φ = 405531648.

The previous prime is 1520745101. The next prime is 1520745133. The reversal of 1520745120 is 215470251.

1520745120 is a `hidden beast` number, since 1 + 5 + 207 + 451 + 2 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1514455056 + 6290064 = 38916^2 + 2508^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 526597 + ... + 529476.

Almost surely, 2^1520745120 is an apocalyptic number.

1520745120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1520745120 is an abundant number, since it is smaller than the sum of its proper divisors (3668802516).

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

1520745120 is a wasteful number, since it uses less digits than its factorization.

1520745120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1056094 (or 1056083 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The square root of 1520745120 is about 38996.7321707858. The cubic root of 1520745120 is about 1149.9672630883.

The spelling of 1520745120 in words is "one billion, five hundred twenty million, seven hundred forty-five thousand, one hundred twenty".