1255391901259 has 16 divisors (see below), whose sum is σ = 1411580731680. Its totient is φ = 1109452861440.

The previous prime is 1255391901251. The next prime is 1255391901263. The reversal of 1255391901259 is 9521091935521.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1255391901259 - 2³ = 1255391901251 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1255391901251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17161122 + ... + 17234119.

It is an arithmetic number, because the mean of its divisors is an integer number (88223795730).

Almost surely, 2^{1255391901259} is an apocalyptic number.

1255391901259 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1255391901259 is a deficient number, since it is larger than the sum of its proper divisors (156188830421).

1255391901259 is a wasteful number, since it uses less digits than its factorization.

1255391901259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34395390.

The product of its (nonzero) digits is 1093500, while the sum is 52.

The spelling of 1255391901259 in words is "one trillion, two hundred fifty-five billion, three hundred ninety-one million, nine hundred one thousand, two hundred fifty-nine".