12749280 has 48 divisors (see below), whose sum is σ = 40161744. Its totient is φ = 3399680.

The previous prime is 12749273. The next prime is 12749293. The reversal of 12749280 is 8294721.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12801 + ... + 13760.

It is an arithmetic number, because the mean of its divisors is an integer number (836703).

Almost surely, 2^12749280 is an apocalyptic number.

12749280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12749280 is an abundant number, since it is smaller than the sum of its proper divisors (27412464).

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

12749280 is a wasteful number, since it uses less digits than its factorization.

12749280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26579 (or 26571 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 12749280 is about 3570.6133926820. The cubic root of 12749280 is about 233.6120388491.

The spelling of 12749280 in words is "twelve million, seven hundred forty-nine thousand, two hundred eighty".