1242130331 has 4 divisors (see below), whose sum is σ = 1337678832. Its totient is φ = 1146581832.

The previous prime is 1242130297. The next prime is 1242130333. The reversal of 1242130331 is 1330312421.

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

It is a cyclic number.

It is not a de Polignac number, because 1242130331 - 2¹⁰ = 1242129307 is a prime.

It is a super-2 number, since 2×1242130331² = 3085775518380339122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1242130333) 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, 47774231 + ... + 47774256.

It is an arithmetic number, because the mean of its divisors is an integer number (334419708).

Almost surely, 2^1242130331 is an apocalyptic number.

1242130331 is a deficient number, since it is larger than the sum of its proper divisors (95548501).

1242130331 is an equidigital number, since it uses as much as digits as its factorization.

1242130331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95548500.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 1242130331 is about 35243.8694101542. The cubic root of 1242130331 is about 1074.9519592016.

Adding to 1242130331 its reverse (1330312421), we get a palindrome (2572442752).

The spelling of 1242130331 in words is "one billion, two hundred forty-two million, one hundred thirty thousand, three hundred thirty-one".