12270442 has 4 divisors (see below), whose sum is σ = 18405666. Its totient is φ = 6135220.

The previous prime is 12270397. The next prime is 12270443. The reversal of 12270442 is 24407221.

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: 24407221 = 379 ⋅64399.

It can be written as a sum of positive squares in only one way, i.e., 9308601 + 2961841 = 3051^2 + 1721^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (12270443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3067609 + ... + 3067612.

Almost surely, 2^12270442 is an apocalyptic number.

12270442 is a deficient number, since it is larger than the sum of its proper divisors (6135224).

12270442 is an equidigital number, since it uses as much as digits as its factorization.

12270442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6135223.

The product of its (nonzero) digits is 896, while the sum is 22.

The square root of 12270442 is about 3502.9190684342. The cubic root of 12270442 is about 230.6499699268.

Adding to 12270442 its reverse (24407221), we get a palindrome (36677663).

The spelling of 12270442 in words is "twelve million, two hundred seventy thousand, four hundred forty-two".