1231055242 has 4 divisors (see below), whose sum is σ = 1846582866. Its totient is φ = 615527620.

The previous prime is 1231055219. The next prime is 1231055251. The reversal of 1231055242 is 2425501321.

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., 1110955561 + 120099681 = 33331^2 + 10959^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 307763809 + ... + 307763812.

Almost surely, 2^1231055242 is an apocalyptic number.

1231055242 is a deficient number, since it is larger than the sum of its proper divisors (615527624).

1231055242 is an equidigital number, since it uses as much as digits as its factorization.

1231055242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615527623.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1231055242 is about 35086.3968227004. The cubic root of 1231055242 is about 1071.7475858567.

Adding to 1231055242 its reverse (2425501321), we get a palindrome (3656556563).

The spelling of 1231055242 in words is "one billion, two hundred thirty-one million, fifty-five thousand, two hundred forty-two".