1255643326 has 12 divisors (see below), whose sum is σ = 2190969648. Its totient is φ = 538132812.

The previous prime is 1255643309. The next prime is 1255643377. The reversal of 1255643326 is 6233465521.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6406246 + ... + 6406441.

It is an arithmetic number, because the mean of its divisors is an integer number (182580804).

Almost surely, 2^1255643326 is an apocalyptic number.

1255643326 is a deficient number, since it is larger than the sum of its proper divisors (935326322).

1255643326 is a wasteful number, since it uses less digits than its factorization.

1255643326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12812703 (or 12812696 counting only the distinct ones).

The product of its digits is 129600, while the sum is 37.

The square root of 1255643326 is about 35435.0578664689. The cubic root of 1255643326 is about 1078.8360018656.

The spelling of 1255643326 in words is "one billion, two hundred fifty-five million, six hundred forty-three thousand, three hundred twenty-six".