1256497 has 8 divisors (see below), whose sum is σ = 1385280. Its totient is φ = 1130160.

The previous prime is 1256477. The next prime is 1256531. The reversal of 1256497 is 7946521.

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 1256497 - 2⁷ = 1256369 is a prime.

It is a super-2 number, since 2×1256497² = 3157569422018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1256407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 579 + ... + 1687.

It is an arithmetic number, because the mean of its divisors is an integer number (173160).

2^1256497 is an apocalyptic number.

It is an amenable number.

1256497 is a deficient number, since it is larger than the sum of its proper divisors (128783).

1256497 is a wasteful number, since it uses less digits than its factorization.

1256497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1223.

The product of its digits is 15120, while the sum is 34.

The square root of 1256497 is about 1120.9357697924. The cubic root of 1256497 is about 107.9080435825.

The spelling of 1256497 in words is "one million, two hundred fifty-six thousand, four hundred ninety-seven".