1231240522 has 4 divisors (see below), whose sum is σ = 1846860786. Its totient is φ = 615620260.

The previous prime is 1231240519. The next prime is 1231240523. The reversal of 1231240522 is 2250421321.

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: 2250421321 = 137 ⋅16426433.

It can be written as a sum of positive squares in only one way, i.e., 1231237921 + 2601 = 35089^2 + 51^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1231240493 and 1231240502.

It is not an unprimeable number, because it can be changed into a prime (1231240523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 307810129 + ... + 307810132.

Almost surely, 2^1231240522 is an apocalyptic number.

1231240522 is a deficient number, since it is larger than the sum of its proper divisors (615620264).

1231240522 is an equidigital number, since it uses as much as digits as its factorization.

1231240522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615620263.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 1231240522 is about 35089.0370628776. The cubic root of 1231240522 is about 1071.8013509585.

Adding to 1231240522 its reverse (2250421321), we get a palindrome (3481661843).

The spelling of 1231240522 in words is "one billion, two hundred thirty-one million, two hundred forty thousand, five hundred twenty-two".