12252991 has 4 divisors (see below), whose sum is σ = 12316672. Its totient is φ = 12189312.

The previous prime is 12252953. The next prime is 12253013. The reversal of 12252991 is 19925221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12252991 - 2¹¹ = 12250943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12252901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31551 + ... + 31936.

It is an arithmetic number, because the mean of its divisors is an integer number (3079168).

Almost surely, 2^12252991 is an apocalyptic number.

12252991 is a deficient number, since it is larger than the sum of its proper divisors (63681).

12252991 is an equidigital number, since it uses as much as digits as its factorization.

12252991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63680.

The product of its digits is 3240, while the sum is 31.

The square root of 12252991 is about 3500.4272596356. The cubic root of 12252991 is about 230.5405747292.

The spelling of 12252991 in words is "twelve million, two hundred fifty-two thousand, nine hundred ninety-one".