13140312 has 16 divisors (see below), whose sum is σ = 32850840. Its totient is φ = 4380096.

The previous prime is 13140293. The next prime is 13140313. The reversal of 13140312 is 21304131.

It is a junction number, because it is equal to n+sod(n) for n = 13140291 and 13140300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13140313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 273733 + ... + 273780.

Almost surely, 2^13140312 is an apocalyptic number.

13140312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13140312 is an abundant number, since it is smaller than the sum of its proper divisors (19710528).

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

13140312 is a wasteful number, since it uses less digits than its factorization.

13140312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547522 (or 547518 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 13140312 is about 3624.9568273291. The cubic root of 13140312 is about 235.9763933105.

Adding to 13140312 its reverse (21304131), we get a palindrome (34444443).

The spelling of 13140312 in words is "thirteen million, one hundred forty thousand, three hundred twelve".