1242431011 has 8 divisors (see below), whose sum is σ = 1268598240. Its totient is φ = 1216535232.

The previous prime is 1242430939. The next prime is 1242431023. The reversal of 1242431011 is 1101342421.

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 1242431011 - 2²⁷ = 1108213283 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1242431011.

It is not an unprimeable number, because it can be changed into a prime (1242431611) 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, 58600 + ... + 76933.

It is an arithmetic number, because the mean of its divisors is an integer number (158574780).

Almost surely, 2^1242431011 is an apocalyptic number.

1242431011 is a deficient number, since it is larger than the sum of its proper divisors (26167229).

1242431011 is a wasteful number, since it uses less digits than its factorization.

1242431011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135725.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1242431011 is about 35248.1348584574. The cubic root of 1242431011 is about 1075.0386893593.

Adding to 1242431011 its reverse (1101342421), we get a palindrome (2343773432).

The spelling of 1242431011 in words is "one billion, two hundred forty-two million, four hundred thirty-one thousand, eleven".