12801540 has 24 divisors (see below), whose sum is σ = 35844480. Its totient is φ = 3413728.

The previous prime is 12801533. The next prime is 12801541. The reversal of 12801540 is 4510821.

It is not an unprimeable number, because it can be changed into a prime (12801541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106620 + ... + 106739.

It is an arithmetic number, because the mean of its divisors is an integer number (1493520).

Almost surely, 2^12801540 is an apocalyptic number.

12801540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12801540 is an abundant number, since it is smaller than the sum of its proper divisors (23042940).

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

12801540 is a wasteful number, since it uses less digits than its factorization.

12801540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213371 (or 213369 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 12801540 is about 3577.9239790694. The cubic root of 12801540 is about 233.9307999044.

The spelling of 12801540 in words is "twelve million, eight hundred one thousand, five hundred forty".