13155140 has 24 divisors (see below), whose sum is σ = 27914712. Its totient is φ = 5207040.

The previous prime is 13155139. The next prime is 13155143. The reversal of 13155140 is 4155131.

It can be written as a sum of positive squares in 4 ways, for example, as 891136 + 12264004 = 944^2 + 3502^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (13155143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1451 + ... + 5330.

It is an arithmetic number, because the mean of its divisors is an integer number (1163113).

Almost surely, 2^13155140 is an apocalyptic number.

13155140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13155140 is an abundant number, since it is smaller than the sum of its proper divisors (14759572).

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

13155140 is a wasteful number, since it uses less digits than its factorization.

13155140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6887 (or 6885 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 13155140 is about 3627.0015164044. The cubic root of 13155140 is about 236.0651213567.

Subtracting from 13155140 its reverse (4155131), we obtain a palindrome (9000009).

The spelling of 13155140 in words is "thirteen million, one hundred fifty-five thousand, one hundred forty".