12775540 has 24 divisors (see below), whose sum is σ = 27401472. Its totient is φ = 5001120.

The previous prime is 12775537. The next prime is 12775547. The reversal of 12775540 is 4557721.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12775547) 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 7 ways as a sum of consecutive naturals, for example, 5856 + ... + 7735.

It is an arithmetic number, because the mean of its divisors is an integer number (1141728).

Almost surely, 2^12775540 is an apocalyptic number.

12775540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12775540 is an abundant number, since it is smaller than the sum of its proper divisors (14625932).

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

12775540 is a wasteful number, since it uses less digits than its factorization.

12775540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13647 (or 13645 counting only the distinct ones).

The product of its (nonzero) digits is 9800, while the sum is 31.

The square root of 12775540 is about 3574.2887404349. The cubic root of 12775540 is about 233.7723209737.

The spelling of 12775540 in words is "twelve million, seven hundred seventy-five thousand, five hundred forty".