12949540 has 12 divisors (see below), whose sum is σ = 27194076. Its totient is φ = 5179808.

The previous prime is 12949523. The next prime is 12949553. The reversal of 12949540 is 4594921.

It can be written as a sum of positive squares in 2 ways, for example, as 6022116 + 6927424 = 2454^2 + 2632^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12949496 and 12949505.

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, 323719 + ... + 323758.

It is an arithmetic number, because the mean of its divisors is an integer number (2266173).

Almost surely, 2^12949540 is an apocalyptic number.

12949540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12949540 is an abundant number, since it is smaller than the sum of its proper divisors (14244536).

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

12949540 is a wasteful number, since it uses less digits than its factorization.

12949540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647486 (or 647484 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 12949540 is about 3598.5469289701. The cubic root of 12949540 is about 234.8288477645.

The spelling of 12949540 in words is "twelve million, nine hundred forty-nine thousand, five hundred forty".