1242135326 has 4 divisors (see below), whose sum is σ = 1863202992. Its totient is φ = 621067662.

The previous prime is 1242135313. The next prime is 1242135331. The reversal of 1242135326 is 6235312421.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310533830 + ... + 310533833.

It is an arithmetic number, because the mean of its divisors is an integer number (465800748).

Almost surely, 2^1242135326 is an apocalyptic number.

1242135326 is a deficient number, since it is larger than the sum of its proper divisors (621067666).

1242135326 is an equidigital number, since it uses as much as digits as its factorization.

1242135326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621067665.

The product of its digits is 8640, while the sum is 29.

The square root of 1242135326 is about 35243.9402734711. The cubic root of 1242135326 is about 1074.9534001073.

Adding to 1242135326 its reverse (6235312421), we get a palindrome (7477447747).

The spelling of 1242135326 in words is "one billion, two hundred forty-two million, one hundred thirty-five thousand, three hundred twenty-six".