1117206257 has 4 divisors (see below), whose sum is σ = 1117351536. Its totient is φ = 1117060980.

The previous prime is 1117206203. The next prime is 1117206269. The reversal of 1117206257 is 7526027111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1117206257 - 2⁶ = 1117206193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1117206287) 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, 60419 + ... + 76712.

It is an arithmetic number, because the mean of its divisors is an integer number (279337884).

Almost surely, 2^1117206257 is an apocalyptic number.

It is an amenable number.

1117206257 is a deficient number, since it is larger than the sum of its proper divisors (145279).

1117206257 is an equidigital number, since it uses as much as digits as its factorization.

1117206257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145278.

The product of its (nonzero) digits is 5880, while the sum is 32.

The square root of 1117206257 is about 33424.6354804357. The cubic root of 1117206257 is about 1037.6346196248.

The spelling of 1117206257 in words is "one billion, one hundred seventeen million, two hundred six thousand, two hundred fifty-seven".