1256899 has 12 divisors (see below), whose sum is σ = 1481544. Its totient is φ = 1063104.

The previous prime is 1256897. The next prime is 1256903. The reversal of 1256899 is 9986521.

It is not a de Polignac number, because 1256899 - 2¹ = 1256897 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (1256891) 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 11 ways as a sum of consecutive naturals, for example, 5424 + ... + 5650.

It is an arithmetic number, because the mean of its divisors is an integer number (123462).

2^1256899 is an apocalyptic number.

1256899 is a deficient number, since it is larger than the sum of its proper divisors (224645).

1256899 is a wasteful number, since it uses less digits than its factorization.

1256899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354 (or 347 counting only the distinct ones).

The product of its digits is 38880, while the sum is 40.

The square root of 1256899 is about 1121.1150699192. The cubic root of 1256899 is about 107.9195502841.

The spelling of 1256899 in words is "one million, two hundred fifty-six thousand, eight hundred ninety-nine".