1520070561 has 6 divisors (see below), whose sum is σ = 2195657490. Its totient is φ = 1013380368.

The previous prime is 1520070557. The next prime is 1520070577. The reversal of 1520070561 is 1650700251.

1520070561 is a `hidden beast` number, since 15 + 20 + 0 + 70 + 561 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1201662225 + 318408336 = 34665^2 + 17844^2 .

It is not a de Polignac number, because 1520070561 - 2² = 1520070557 is a prime.

It is a super-2 number, since 2×1520070561² = 4621229020837709442, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1520075561) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 84448356 + ... + 84448373.

It is an arithmetic number, because the mean of its divisors is an integer number (365942915).

Almost surely, 2^1520070561 is an apocalyptic number.

It is an amenable number.

1520070561 is a deficient number, since it is larger than the sum of its proper divisors (675586929).

1520070561 is a wasteful number, since it uses less digits than its factorization.

1520070561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168896735 (or 168896732 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

The square root of 1520070561 is about 38988.0822944653. The cubic root of 1520070561 is about 1149.7972070894.

The spelling of 1520070561 in words is "one billion, five hundred twenty million, seventy thousand, five hundred sixty-one".