13145940 has 72 divisors (see below), whose sum is σ = 40185600. Its totient is φ = 3478464.

The previous prime is 13145921. The next prime is 13145941. The reversal of 13145940 is 4954131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13145941) 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 23 ways as a sum of consecutive naturals, for example, 35637 + ... + 36003.

Almost surely, 2^13145940 is an apocalyptic number.

13145940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13145940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20092800).

13145940 is an abundant number, since it is smaller than the sum of its proper divisors (27039660).

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

13145940 is a wasteful number, since it uses less digits than its factorization.

13145940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581 (or 576 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 13145940 is about 3625.7330293335. The cubic root of 13145940 is about 236.0100780911.

The spelling of 13145940 in words is "thirteen million, one hundred forty-five thousand, nine hundred forty".