1255275389 has 4 divisors (see below), whose sum is σ = 1281983424. Its totient is φ = 1228567356.

The previous prime is 1255275367. The next prime is 1255275401. The reversal of 1255275389 is 9835725521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1255275389 - 2¹⁶ = 1255209853 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47), and also a Moran number because the ratio is a prime number: 26707987 = 1255275389 / (1 + 2 + 5 + 5 + 2 + 7 + 5 + 3 + 8 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255275349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13353947 + ... + 13354040.

It is an arithmetic number, because the mean of its divisors is an integer number (320495856).

Almost surely, 2^1255275389 is an apocalyptic number.

It is an amenable number.

1255275389 is a deficient number, since it is larger than the sum of its proper divisors (26708035).

1255275389 is an equidigital number, since it uses as much as digits as its factorization.

1255275389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26708034.

The product of its digits is 756000, while the sum is 47.

The square root of 1255275389 is about 35429.8657773354. The cubic root of 1255275389 is about 1078.7306156592.

The spelling of 1255275389 in words is "one billion, two hundred fifty-five million, two hundred seventy-five thousand, three hundred eighty-nine".