1249344431 has 4 divisors (see below), whose sum is σ = 1249591392. Its totient is φ = 1249097472.

The previous prime is 1249344427. The next prime is 1249344457. The reversal of 1249344431 is 1344439421.

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 1249344431 - 2² = 1249344427 is a prime.

It is a super-2 number, since 2×1249344431² = 3121723014541427522, 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 = 1249344391 and 1249344400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1249344491) 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, 115730 + ... + 126063.

It is an arithmetic number, because the mean of its divisors is an integer number (312397848).

Almost surely, 2^1249344431 is an apocalyptic number.

1249344431 is a deficient number, since it is larger than the sum of its proper divisors (246961).

1249344431 is an equidigital number, since it uses as much as digits as its factorization.

1249344431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246960.

The product of its digits is 41472, while the sum is 35.

The square root of 1249344431 is about 35346.0666977247. The cubic root of 1249344431 is about 1077.0289946723.

The spelling of 1249344431 in words is "one billion, two hundred forty-nine million, three hundred forty-four thousand, four hundred thirty-one".