12145749 has 16 divisors (see below), whose sum is σ = 20190720. Its totient is φ = 6309360.

The previous prime is 12145739. The next prime is 12145753. The reversal of 12145749 is 94754121.

It is a happy number.

12145749 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12145749 - 2⁴ = 12145733 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12145739) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26059 + ... + 26520.

It is an arithmetic number, because the mean of its divisors is an integer number (1261920).

Almost surely, 2^12145749 is an apocalyptic number.

It is an amenable number.

12145749 is a deficient number, since it is larger than the sum of its proper divisors (8044971).

12145749 is a wasteful number, since it uses less digits than its factorization.

12145749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52600.

The product of its digits is 10080, while the sum is 33.

The square root of 12145749 is about 3485.0751785292. The cubic root of 12145749 is about 229.8660152210.

The spelling of 12145749 in words is "twelve million, one hundred forty-five thousand, seven hundred forty-nine".