12453842 has 4 divisors (see below), whose sum is σ = 18680766. Its totient is φ = 6226920.

The previous prime is 12453829. The next prime is 12453851. The reversal of 12453842 is 24835421.

It is a happy number.

It is a Cunningham number, because it is equal to 3529²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24835421 = 13 ⋅1910417.

It can be written as a sum of positive squares in only one way, i.e., 12453841 + 1 = 3529^2 + 1^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 3113459 + ... + 3113462.

Almost surely, 2^12453842 is an apocalyptic number.

12453842 is a deficient number, since it is larger than the sum of its proper divisors (6226924).

12453842 is an equidigital number, since it uses as much as digits as its factorization.

12453842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6226923.

The product of its digits is 7680, while the sum is 29.

The square root of 12453842 is about 3529.0001416832. Note that the first 3 decimals coincide. The cubic root of 12453842 is about 231.7934273988.

The spelling of 12453842 in words is "twelve million, four hundred fifty-three thousand, eight hundred forty-two".