12340537 has 4 divisors (see below), whose sum is σ = 13462416. Its totient is φ = 11218660.

The previous prime is 12340513. The next prime is 12340541. The reversal of 12340537 is 73504321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 73504321 = 11 ⋅6682211.

It is a cyclic number.

It is not a de Polignac number, because 12340537 - 2⁷ = 12340409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12340507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 560923 + ... + 560944.

It is an arithmetic number, because the mean of its divisors is an integer number (3365604).

Almost surely, 2^12340537 is an apocalyptic number.

It is an amenable number.

12340537 is a deficient number, since it is larger than the sum of its proper divisors (1121879).

12340537 is a wasteful number, since it uses less digits than its factorization.

12340537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1121878.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 12340537 is about 3512.9100472400. The cubic root of 12340537 is about 231.0883328776.

Adding to 12340537 its reverse (73504321), we get a palindrome (85844858).

The spelling of 12340537 in words is "twelve million, three hundred forty thousand, five hundred thirty-seven".