1297656 has 48 divisors (see below), whose sum is σ = 3580200. Its totient is φ = 424512.

The previous prime is 1297651. The next prime is 1297657. The reversal of 1297656 is 6567921.

It is a super-2 number, since 2×1297656² = 3367822188672, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1297656.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1297651) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4690 + ... + 4958.

2^1297656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1297656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1790100).

1297656 is an abundant number, since it is smaller than the sum of its proper divisors (2282544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1297656 is a wasteful number, since it uses less digits than its factorization.

1297656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348 (or 341 counting only the distinct ones).

The product of its digits is 22680, while the sum is 36.

The square root of 1297656 is about 1139.1470493312. The cubic root of 1297656 is about 109.0736533313.

1297656 divided by its sum of digits (36) gives a triangular number (36046 = T₂₆₈).

It can be divided in two parts, 1297 and 656, that added together give a triangular number (1953 = T₆₂).

The spelling of 1297656 in words is "one million, two hundred ninety-seven thousand, six hundred fifty-six".