1242131131 has 8 divisors (see below), whose sum is σ = 1246916528. Its totient is φ = 1237356000.

The previous prime is 1242131089. The next prime is 1242131147. The reversal of 1242131131 is 1311312421.

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

It is a cyclic number.

It is not a de Polignac number, because 1242131131 - 2⁷ = 1242131003 is a prime.

It is a super-2 number, since 2×1242131131² = 3085779493198678322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1242131099 and 1242131108.

It is not an unprimeable number, because it can be changed into a prime (1242131171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 306901 + ... + 310921.

It is an arithmetic number, because the mean of its divisors is an integer number (155864566).

Almost surely, 2^1242131131 is an apocalyptic number.

1242131131 is a deficient number, since it is larger than the sum of its proper divisors (4785397).

1242131131 is an equidigital number, since it uses as much as digits as its factorization.

1242131131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5133.

The product of its digits is 144, while the sum is 19.

The square root of 1242131131 is about 35243.8807596439. The cubic root of 1242131131 is about 1074.9521899775.

Adding to 1242131131 its reverse (1311312421), we get a palindrome (2553443552).

The spelling of 1242131131 in words is "one billion, two hundred forty-two million, one hundred thirty-one thousand, one hundred thirty-one".