1256345 has 8 divisors (see below), whose sum is σ = 1529280. Its totient is φ = 990640.

The previous prime is 1256323. The next prime is 1256347. The reversal of 1256345 is 5436521.

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

It is not a de Polignac number, because 1256345 - 2¹⁰ = 1255321 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (1256347) by changing a digit.

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, 1415 + ... + 2124.

It is an arithmetic number, because the mean of its divisors is an integer number (191160).

2^1256345 is an apocalyptic number.

It is an amenable number.

1256345 is a deficient number, since it is larger than the sum of its proper divisors (272935).

1256345 is an equidigital number, since it uses as much as digits as its factorization.

1256345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3615.

The product of its digits is 3600, while the sum is 26.

The square root of 1256345 is about 1120.8679672468. The cubic root of 1256345 is about 107.9036921504.

The spelling of 1256345 in words is "one million, two hundred fifty-six thousand, three hundred forty-five".