12251137 has 4 divisors (see below), whose sum is σ = 12673620. Its totient is φ = 11828656.

The previous prime is 12251131. The next prime is 12251147. The reversal of 12251137 is 73115221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 73115221 = 47 ⋅1555643.

It can be written as a sum of positive squares in 2 ways, for example, as 9678321 + 2572816 = 3111^2 + 1604^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12251137 is a prime.

It is a Duffinian number.

It is a zygodrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (12251131) 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, 211198 + ... + 211255.

It is an arithmetic number, because the mean of its divisors is an integer number (3168405).

It is a Proth number, since it is equal to 2991 ⋅ 2¹² + 1 and 2991 < 2¹².

Almost surely, 2^12251137 is an apocalyptic number.

It is an amenable number.

12251137 is a deficient number, since it is larger than the sum of its proper divisors (422483).

12251137 is an equidigital number, since it uses as much as digits as its factorization.

12251137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422482.

The product of its digits is 420, while the sum is 22.

The square root of 12251137 is about 3500.1624248026. The cubic root of 12251137 is about 230.5289464449.

Adding to 12251137 its reverse (73115221), we get a palindrome (85366358).

The spelling of 12251137 in words is "twelve million, two hundred fifty-one thousand, one hundred thirty-seven".