12275749 has 4 divisors (see below), whose sum is σ = 12607564. Its totient is φ = 11943936.

The previous prime is 12275743. The next prime is 12275759. The reversal of 12275749 is 94757221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94757221 = 13 ⋅7289017.

It can be written as a sum of positive squares in 2 ways, for example, as 11937025 + 338724 = 3455^2 + 582^2 .

It is a 7-Lehmer number, since φ(12275749) divides (12275749-1)⁷.

It is a cyclic number.

It is not a de Polignac number, because 12275749 - 2³ = 12275741 is a prime.

It is a super-2 number, since 2×12275749² = 301388027022002, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 331777 = 12275749 / (1 + 2 + 2 + 7 + 5 + 7 + 4 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12275741) 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, 165852 + ... + 165925.

It is an arithmetic number, because the mean of its divisors is an integer number (3151891).

Almost surely, 2^12275749 is an apocalyptic number.

It is an amenable number.

12275749 is a deficient number, since it is larger than the sum of its proper divisors (331815).

12275749 is an equidigital number, since it uses as much as digits as its factorization.

12275749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331814.

The product of its digits is 35280, while the sum is 37.

The square root of 12275749 is about 3503.6764976236. The cubic root of 12275749 is about 230.6832173834.

The spelling of 12275749 in words is "twelve million, two hundred seventy-five thousand, seven hundred forty-nine".