1242112431 has 8 divisors (see below), whose sum is σ = 1892742784. Its totient is φ = 709778520.

The previous prime is 1242112409. The next prime is 1242112477. The reversal of 1242112431 is 1342112421.

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

It is not a de Polignac number, because 1242112431 - 2²³ = 1233723823 is a prime.

It is a super-2 number, since 2×1242112431² = 3085686582489459522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 59148211 = 1242112431 / (1 + 2 + 4 + 2 + 1 + 1 + 2 + 4 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1242112398 and 1242112407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242112481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29574085 + ... + 29574126.

It is an arithmetic number, because the mean of its divisors is an integer number (236592848).

Almost surely, 2^1242112431 is an apocalyptic number.

1242112431 is a deficient number, since it is larger than the sum of its proper divisors (650630353).

1242112431 is an equidigital number, since it uses as much as digits as its factorization.

1242112431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59148221.

The product of its digits is 384, while the sum is 21.

The square root of 1242112431 is about 35243.6154643646. The cubic root of 1242112431 is about 1074.9467955640.

Adding to 1242112431 its reverse (1342112421), we get a palindrome (2584224852).

The spelling of 1242112431 in words is "one billion, two hundred forty-two million, one hundred twelve thousand, four hundred thirty-one".