12749500 has 48 divisors (see below), whose sum is σ = 28540512. Its totient is φ = 4972800.

The previous prime is 12749489. The next prime is 12749501. The reversal of 12749500 is 594721.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12749501) 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 15 ways as a sum of consecutive naturals, for example, 21204 + ... + 21796.

It is an arithmetic number, because the mean of its divisors is an integer number (594594).

Almost surely, 2^12749500 is an apocalyptic number.

12749500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12749500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14270256).

12749500 is an abundant number, since it is smaller than the sum of its proper divisors (15791012).

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

12749500 is a wasteful number, since it uses less digits than its factorization.

12749500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655 (or 643 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 12749500 is about 3570.6441995808. The cubic root of 12749500 is about 233.6133825682.

The spelling of 12749500 in words is "twelve million, seven hundred forty-nine thousand, five hundred".