1244042431 has 4 divisors (see below), whose sum is σ = 1284172864. Its totient is φ = 1203912000.

The previous prime is 1244042383. The next prime is 1244042441. The reversal of 1244042431 is 1342404421.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1244042431 is a prime.

It is a super-2 number, since 2×1244042431² = 3095283140256779522, 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 = 1244042396 and 1244042405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1244042441) 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, 20065170 + ... + 20065231.

It is an arithmetic number, because the mean of its divisors is an integer number (321043216).

Almost surely, 2^1244042431 is an apocalyptic number.

1244042431 is a deficient number, since it is larger than the sum of its proper divisors (40130433).

1244042431 is an equidigital number, since it uses as much as digits as its factorization.

1244042431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40130432.

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 1244042431 is about 35270.9856822857. The cubic root of 1244042431 is about 1075.5032598739.

Adding to 1244042431 its reverse (1342404421), we get a palindrome (2586446852).

The spelling of 1244042431 in words is "one billion, two hundred forty-four million, forty-two thousand, four hundred thirty-one".