1255905219 has 16 divisors (see below), whose sum is σ = 1681419168. Its totient is φ = 833839872.

The previous prime is 1255905197. The next prime is 1255905229. The reversal of 1255905219 is 9125095521.

It is not a de Polignac number, because 1255905219 - 2⁹ = 1255904707 is a prime.

It is a super-3 number, since 3×1255905219³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (1255905229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1431609 + ... + 1432485.

It is an arithmetic number, because the mean of its divisors is an integer number (105088698).

Almost surely, 2^1255905219 is an apocalyptic number.

1255905219 is a deficient number, since it is larger than the sum of its proper divisors (425513949).

1255905219 is an equidigital number, since it uses as much as digits as its factorization.

1255905219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2294.

The product of its (nonzero) digits is 40500, while the sum is 39.

The square root of 1255905219 is about 35438.7530677929. The cubic root of 1255905219 is about 1078.9110019207.

The spelling of 1255905219 in words is "one billion, two hundred fifty-five million, nine hundred five thousand, two hundred nineteen".