1520298081 has 27 divisors (see below), whose sum is σ = 2257975993. Its totient is φ = 985692480.

The previous prime is 1520298071. The next prime is 1520298103. The reversal of 1520298081 is 1808920251.

The square root of 1520298081 is 38991.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 1220454225 + 299843856 = 34935^2 + 17316^2 .

It is not a de Polignac number, because 1520298081 - 2¹⁹ = 1519773793 is a prime.

It is a super-2 number, since 2×1520298081² = 4622612510184565122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1520298011) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 4795735 + ... + 4796051.

Almost surely, 2^1520298081 is an apocalyptic number.

1520298081 is the 38991-st square number.

1520298081 is the 19496-th centered octagonal number.

It is an amenable number.

1520298081 is a deficient number, since it is larger than the sum of its proper divisors (737677912).

1520298081 is an frugal number, since it uses more digits than its factorization.

1520298081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 722 (or 361 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The cubic root of 1520298081 is about 1149.8545703935.

Multiplying 1520298081 by its sum of digits (36), we get a square (54730730916 = 233946²).

The spelling of 1520298081 in words is "one billion, five hundred twenty million, two hundred ninety-eight thousand, eighty-one".