1265494343 has 4 divisors (see below), whose sum is σ = 1294924488. Its totient is φ = 1236064200.

The previous prime is 1265494319. The next prime is 1265494361. The reversal of 1265494343 is 3434945621.

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 1265494343 - 2²⁶ = 1198385479 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 1265494343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1265494543) 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, 14715008 + ... + 14715093.

It is an arithmetic number, because the mean of its divisors is an integer number (323731122).

Almost surely, 2^1265494343 is an apocalyptic number.

1265494343 is a deficient number, since it is larger than the sum of its proper divisors (29430145).

1265494343 is an equidigital number, since it uses as much as digits as its factorization.

1265494343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29430144.

The product of its digits is 311040, while the sum is 41.

The square root of 1265494343 is about 35573.7873018885. The cubic root of 1265494343 is about 1081.6499537331.

The spelling of 1265494343 in words is "one billion, two hundred sixty-five million, four hundred ninety-four thousand, three hundred forty-three".