1255680259 has 4 divisors (see below), whose sum is σ = 1257021304. Its totient is φ = 1254339216.

The previous prime is 1255680199. The next prime is 1255680271. The reversal of 1255680259 is 9520865521.

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 1255680259 - 2¹¹ = 1255678211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1255680289) 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, 669117 + ... + 670990.

It is an arithmetic number, because the mean of its divisors is an integer number (314255326).

Almost surely, 2^1255680259 is an apocalyptic number.

1255680259 is a deficient number, since it is larger than the sum of its proper divisors (1341045).

1255680259 is an equidigital number, since it uses as much as digits as its factorization.

1255680259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1341044.

The product of its (nonzero) digits is 216000, while the sum is 43.

The square root of 1255680259 is about 35435.5789990794. The cubic root of 1255680259 is about 1078.8465792482.

The spelling of 1255680259 in words is "one billion, two hundred fifty-five million, six hundred eighty thousand, two hundred fifty-nine".