13161240 has 48 divisors (see below), whose sum is σ = 42775200. Its totient is φ = 3509568.

The previous prime is 13161229. The next prime is 13161277. The reversal of 13161240 is 4216131.

It is a happy number.

13161240 is a `hidden beast` number, since 13 + 1 + 612 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17920 + ... + 18639.

It is an arithmetic number, because the mean of its divisors is an integer number (891150).

Almost surely, 2^13161240 is an apocalyptic number.

13161240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13161240 is an abundant number, since it is smaller than the sum of its proper divisors (29613960).

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

13161240 is a wasteful number, since it uses less digits than its factorization.

13161240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36576 (or 36569 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 13161240 is about 3627.8423339500. The cubic root of 13161240 is about 236.1016032875.

Adding to 13161240 its reverse (4216131), we get a palindrome (17377371).

It can be divided in two parts, 1316 and 1240, that added together give a triangular number (2556 = T₇₁).

The spelling of 13161240 in words is "thirteen million, one hundred sixty-one thousand, two hundred forty".