1255772919 has 8 divisors (see below), whose sum is σ = 1684042992. Its totient is φ = 832342400.

The previous prime is 1255772891. The next prime is 1255772923. The reversal of 1255772919 is 9192775521.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1255772919 - 2¹² = 1255768823 is a prime.

It is a super-2 number, since 2×1255772919² = 3153931248187561122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255772939) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1209282 + ... + 1210319.

It is an arithmetic number, because the mean of its divisors is an integer number (210505374).

Almost surely, 2^1255772919 is an apocalyptic number.

1255772919 is a deficient number, since it is larger than the sum of its proper divisors (428270073).

1255772919 is a wasteful number, since it uses less digits than its factorization.

1255772919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2419777.

The product of its digits is 396900, while the sum is 48.

The square root of 1255772919 is about 35436.8864179685. The cubic root of 1255772919 is about 1078.8731155856.

The spelling of 1255772919 in words is "one billion, two hundred fifty-five million, seven hundred seventy-two thousand, nine hundred nineteen".