1255645 has 8 divisors (see below), whose sum is σ = 1521504. Its totient is φ = 994704.

The previous prime is 1255633. The next prime is 1255651. The reversal of 1255645 is 5465521.

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 1255645 - 2¹³ = 1247453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 639 + ... + 1708.

It is an arithmetic number, because the mean of its divisors is an integer number (190188).

2^1255645 is an apocalyptic number.

It is an amenable number.

1255645 is a deficient number, since it is larger than the sum of its proper divisors (265859).

1255645 is a wasteful number, since it uses less digits than its factorization.

1255645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2459.

The product of its digits is 6000, while the sum is 28.

The square root of 1255645 is about 1120.5556657302. Note that the first 3 decimals coincide. The cubic root of 1255645 is about 107.8836481293.

The spelling of 1255645 in words is "one million, two hundred fifty-five thousand, six hundred forty-five".