1255994291 has 4 divisors (see below), whose sum is σ = 1257521232. Its totient is φ = 1254467352.

The previous prime is 1255994249. The next prime is 1255994303. The reversal of 1255994291 is 1924995521.

It is a happy number.

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 1255994291 - 2³⁰ = 182252467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1255694291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 762236 + ... + 763881.

It is an arithmetic number, because the mean of its divisors is an integer number (314380308).

Almost surely, 2^1255994291 is an apocalyptic number.

1255994291 is a deficient number, since it is larger than the sum of its proper divisors (1526941).

1255994291 is an equidigital number, since it uses as much as digits as its factorization.

1255994291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1526940.

The product of its digits is 291600, while the sum is 47.

The square root of 1255994291 is about 35440.0097488700. The cubic root of 1255994291 is about 1078.9365076907.

The spelling of 1255994291 in words is "one billion, two hundred fifty-five million, nine hundred ninety-four thousand, two hundred ninety-one".