13140540 has 72 divisors (see below), whose sum is σ = 45558240. Its totient is φ = 3003264.

The previous prime is 13140529. The next prime is 13140551. The reversal of 13140540 is 4504131.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (13140529) and next prime (13140551).

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 23 ways as a sum of consecutive naturals, for example, 3955 + ... + 6474.

Almost surely, 2^13140540 is an apocalyptic number.

13140540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13140540 is an abundant number, since it is smaller than the sum of its proper divisors (32417700).

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

13140540 is a wasteful number, since it uses less digits than its factorization.

13140540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10451 (or 10446 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 13140540 is about 3624.9882758431. The cubic root of 13140540 is about 235.9777581260.

Adding to 13140540 its reverse (4504131), we get a palindrome (17644671).

The spelling of 13140540 in words is "thirteen million, one hundred forty thousand, five hundred forty".