13145140 has 12 divisors (see below), whose sum is σ = 27604836. Its totient is φ = 5258048.

The previous prime is 13145123. The next prime is 13145159. The reversal of 13145140 is 4154131.

It can be written as a sum of positive squares in 2 ways, for example, as 3671056 + 9474084 = 1916^2 + 3078^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 328609 + ... + 328648.

It is an arithmetic number, because the mean of its divisors is an integer number (2300403).

Almost surely, 2^13145140 is an apocalyptic number.

13145140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13145140 is an abundant number, since it is smaller than the sum of its proper divisors (14459696).

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

13145140 is a wasteful number, since it uses less digits than its factorization.

13145140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657266 (or 657264 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 13145140 is about 3625.6227051363. The cubic root of 13145140 is about 236.0052905067.

Adding to 13145140 its reverse (4154131), we get a palindrome (17299271).

The spelling of 13145140 in words is "thirteen million, one hundred forty-five thousand, one hundred forty".