1255379997 has 8 divisors (see below), whose sum is σ = 1746615744. Its totient is φ = 800532128.

The previous prime is 1255379953. The next prime is 1255380023. The reversal of 1255379997 is 7999735521.

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 1255379997 - 2⁶ = 1255379933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255379947) 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, 9096888 + ... + 9097025.

It is an arithmetic number, because the mean of its divisors is an integer number (218326968).

Almost surely, 2^1255379997 is an apocalyptic number.

It is an amenable number.

1255379997 is a deficient number, since it is larger than the sum of its proper divisors (491235747).

1255379997 is a wasteful number, since it uses less digits than its factorization.

1255379997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18193939.

The product of its digits is 5358150, while the sum is 57.

The square root of 1255379997 is about 35431.3420152271. The cubic root of 1255379997 is about 1078.7605800582.

The spelling of 1255379997 in words is "one billion, two hundred fifty-five million, three hundred seventy-nine thousand, nine hundred ninety-seven".