1255788889 has 8 divisors (see below), whose sum is σ = 1298912000. Its totient is φ = 1212829200.

The previous prime is 1255788887. The next prime is 1255788923. The reversal of 1255788889 is 9888875521.

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 1255788889 - 2¹ = 1255788887 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (1255788887) 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, 25122 + ... + 56059.

It is an arithmetic number, because the mean of its divisors is an integer number (162364000).

Almost surely, 2^1255788889 is an apocalyptic number.

It is an amenable number.

1255788889 is a deficient number, since it is larger than the sum of its proper divisors (43123111).

1255788889 is an equidigital number, since it uses as much as digits as its factorization.

1255788889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81711.

The product of its digits is 12902400, while the sum is 61.

The square root of 1255788889 is about 35437.1117474322. Note that the first 3 decimals coincide. The cubic root of 1255788889 is about 1078.8776890055.

The spelling of 1255788889 in words is "one billion, two hundred fifty-five million, seven hundred eighty-eight thousand, eight hundred eighty-nine".