1581132260 has 24 divisors (see below), whose sum is σ = 3515694840. Its totient is φ = 595249664.

The previous prime is 1581132257. The next prime is 1581132269. The reversal of 1581132260 is 622311851.

It can be written as a sum of positive squares in 4 ways, for example, as 789385216 + 791747044 = 28096^2 + 28138^2 .

It is a super-2 number, since 2×1581132260² = 4999958447225415200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1581132269) 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 7 ways as a sum of consecutive naturals, for example, 2324855 + ... + 2325534.

It is an arithmetic number, because the mean of its divisors is an integer number (146487285).

Almost surely, 2^1581132260 is an apocalyptic number.

1581132260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1581132260 is an abundant number, since it is smaller than the sum of its proper divisors (1934562580).

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

1581132260 is a wasteful number, since it uses less digits than its factorization.

1581132260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4650415 (or 4650413 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 1581132260 is about 39763.4538238318. The cubic root of 1581132260 is about 1164.9914371220.

The spelling of 1581132260 in words is "one billion, five hundred eighty-one million, one hundred thirty-two thousand, two hundred sixty".