13087530 has 24 divisors (see below), whose sum is σ = 34027812. Its totient is φ = 3489984.

The previous prime is 13087519. The next prime is 13087541. The reversal of 13087530 is 3578031.

It is an interprime number because it is at equal distance from previous prime (13087519) and next prime (13087541).

It can be written as a sum of positive squares in 2 ways, for example, as 12089529 + 998001 = 3477^2 + 999^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13087494 and 13087503.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72619 + ... + 72798.

Almost surely, 2^13087530 is an apocalyptic number.

13087530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13087530 is an abundant number, since it is smaller than the sum of its proper divisors (20940282).

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

13087530 is a wasteful number, since it uses less digits than its factorization.

13087530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145430 (or 145427 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 13087530 is about 3617.6691391005. The cubic root of 13087530 is about 235.6600126916.

The spelling of 13087530 in words is "thirteen million, eighty-seven thousand, five hundred thirty".