12901540 has 12 divisors (see below), whose sum is σ = 27093276. Its totient is φ = 5160608.

The previous prime is 12901519. The next prime is 12901541. The reversal of 12901540 is 4510921.

It can be written as a sum of positive squares in 2 ways, for example, as 8608356 + 4293184 = 2934^2 + 2072^2 .

It is not an unprimeable number, because it can be changed into a prime (12901541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 322519 + ... + 322558.

It is an arithmetic number, because the mean of its divisors is an integer number (2257773).

Almost surely, 2^12901540 is an apocalyptic number.

12901540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12901540 is an abundant number, since it is smaller than the sum of its proper divisors (14191736).

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

12901540 is a wasteful number, since it uses less digits than its factorization.

12901540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645086 (or 645084 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 12901540 is about 3591.8713785435. The cubic root of 12901540 is about 234.5383421953.

The spelling of 12901540 in words is "twelve million, nine hundred one thousand, five hundred forty".