1255445 has 8 divisors (see below), whose sum is σ = 1513944. Its totient is φ = 999424.

The previous prime is 1255427. The next prime is 1255451. The reversal of 1255445 is 5445521.

It can be written as a sum of positive squares in 4 ways, for example, as 790321 + 465124 = 889^2 + 682^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1255445 is a prime.

It is a super-2 number, since 2×1255445² = 3152284296050, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 797 + ... + 1773.

It is an arithmetic number, because the mean of its divisors is an integer number (189243).

2^1255445 is an apocalyptic number.

It is an amenable number.

1255445 is a deficient number, since it is larger than the sum of its proper divisors (258499).

1255445 is an equidigital number, since it uses as much as digits as its factorization.

1255445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1239.

The product of its digits is 4000, while the sum is 26.

The square root of 1255445 is about 1120.4664207374. The cubic root of 1255445 is about 107.8779198979.

It can be divided in two parts, 125 and 5445, that multiplied together give a square (680625 = 825²).

The spelling of 1255445 in words is "one million, two hundred fifty-five thousand, four hundred forty-five".