123131242 has 8 divisors (see below), whose sum is σ = 198904356. Its totient is φ = 56829792.

The previous prime is 123131237. The next prime is 123131249. The reversal of 123131242 is 242131321.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 119006281 + 4124961 = 10909^2 + 2031^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×123131242² = 30322605512925128, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (123131249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2367883 + ... + 2367934.

Almost surely, 2^123131242 is an apocalyptic number.

123131242 is a deficient number, since it is larger than the sum of its proper divisors (75773114).

123131242 is a wasteful number, since it uses less digits than its factorization.

123131242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4735832.

The product of its digits is 288, while the sum is 19.

The square root of 123131242 is about 11096.4517752298. The cubic root of 123131242 is about 497.4958015857.

Adding to 123131242 its reverse (242131321), we get a palindrome (365262563).

The spelling of 123131242 in words is "one hundred twenty-three million, one hundred thirty-one thousand, two hundred forty-two".