1255745 has 4 divisors (see below), whose sum is σ = 1506900. Its totient is φ = 1004592.

The previous prime is 1255721. The next prime is 1255747. The reversal of 1255745 is 5475521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 802816 + 452929 = 896^2 + 673^2 .

It is a cyclic number.

It is not a de Polignac number, because 1255745 - 2¹⁴ = 1239361 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1255747) 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, 125570 + ... + 125579.

It is an arithmetic number, because the mean of its divisors is an integer number (376725).

2^1255745 is an apocalyptic number.

It is an amenable number.

1255745 is a deficient number, since it is larger than the sum of its proper divisors (251155).

1255745 is an equidigital number, since it uses as much as digits as its factorization.

1255745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251154.

The product of its digits is 7000, while the sum is 29.

The square root of 1255745 is about 1120.6002855613. The cubic root of 1255745 is about 107.8865120169.

The spelling of 1255745 in words is "one million, two hundred fifty-five thousand, seven hundred forty-five".