1256903 has 2 divisors, whose sum is σ = 1256904. Its totient is φ = 1256902.

The previous prime is 1256897. The next prime is 1256911. The reversal of 1256903 is 3096521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1256903 - 2⁴ = 1256887 is a prime.

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

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1256923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 628451 + 628452.

It is an arithmetic number, because the mean of its divisors is an integer number (628452).

2^1256903 is an apocalyptic number.

1256903 is a deficient number, since it is larger than the sum of its proper divisors (1).

1256903 is an equidigital number, since it uses as much as digits as its factorization.

1256903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 1256903 is about 1121.1168538560. The cubic root of 1256903 is about 107.9196647663.

The spelling of 1256903 in words is "one million, two hundred fifty-six thousand, nine hundred three".