1217759255 has 4 divisors (see below), whose sum is σ = 1461311112. Its totient is φ = 974207400.

The previous prime is 1217759251. The next prime is 1217759339. The reversal of 1217759255 is 5529577121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5529577121 = 3061 ⋅1806461.

It is not a de Polignac number, because 1217759255 - 2² = 1217759251 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1217759251) 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, 121775921 + ... + 121775930.

It is an arithmetic number, because the mean of its divisors is an integer number (365327778).

Almost surely, 2^1217759255 is an apocalyptic number.

1217759255 is a deficient number, since it is larger than the sum of its proper divisors (243551857).

1217759255 is an equidigital number, since it uses as much as digits as its factorization.

1217759255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243551856.

The product of its digits is 220500, while the sum is 44.

The square root of 1217759255 is about 34896.4074798539. The cubic root of 1217759255 is about 1067.8751481815.

The spelling of 1217759255 in words is "one billion, two hundred seventeen million, seven hundred fifty-nine thousand, two hundred fifty-five".