1249971343 has 8 divisors (see below), whose sum is σ = 1290779600. Its totient is φ = 1209696768.

The previous prime is 1249971329. The next prime is 1249971347. The reversal of 1249971343 is 3431799421.

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 1249971343 - 2²⁵ = 1216416911 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

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 1249971343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1249971347) 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, 128658 + ... + 138031.

It is an arithmetic number, because the mean of its divisors is an integer number (161347450).

Almost surely, 2^1249971343 is an apocalyptic number.

1249971343 is a deficient number, since it is larger than the sum of its proper divisors (40808257).

1249971343 is a wasteful number, since it uses less digits than its factorization.

1249971343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266841.

The product of its digits is 163296, while the sum is 43.

The square root of 1249971343 is about 35354.9337858240. The cubic root of 1249971343 is about 1077.2091130017.

The spelling of 1249971343 in words is "one billion, two hundred forty-nine million, nine hundred seventy-one thousand, three hundred forty-three".