1231442 has 4 divisors (see below), whose sum is σ = 1847166. Its totient is φ = 615720.

The previous prime is 1231423. The next prime is 1231453. The reversal of 1231442 is 2441321.

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

It can be written as a sum of positive squares in only one way, i.e., 1002001 + 229441 = 1001^2 + 479^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1231442.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 307859 + ... + 307862.

2^1231442 is an apocalyptic number.

1231442 is a deficient number, since it is larger than the sum of its proper divisors (615724).

1231442 is an equidigital number, since it uses as much as digits as its factorization.

1231442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615723.

The product of its digits is 192, while the sum is 17.

The square root of 1231442 is about 1109.7035640206. The cubic root of 1231442 is about 107.1859810323.

Adding to 1231442 its reverse (2441321), we get a palindrome (3672763).

The spelling of 1231442 in words is "one million, two hundred thirty-one thousand, four hundred forty-two".