13161540 has 48 divisors (see below), whose sum is σ = 42118272. Its totient is φ = 3008256.

The previous prime is 13161527. The next prime is 13161583. The reversal of 13161540 is 4516131.

It is a super-2 number, since 2×13161540² = 346452270343200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15249 + ... + 16088.

It is an arithmetic number, because the mean of its divisors is an integer number (877464).

Almost surely, 2^13161540 is an apocalyptic number.

13161540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13161540 is an abundant number, since it is smaller than the sum of its proper divisors (28956732).

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

13161540 is a wasteful number, since it uses less digits than its factorization.

13161540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31356 (or 31354 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 13161540 is about 3627.8836806050. The cubic root of 13161540 is about 236.1033971900.

Adding to 13161540 its reverse (4516131), we get a palindrome (17677671).

The spelling of 13161540 in words is "thirteen million, one hundred sixty-one thousand, five hundred forty".