1298656 has 12 divisors (see below), whose sum is σ = 2556792. Its totient is φ = 649312.

The previous prime is 1298653. The next prime is 1298699. The reversal of 1298656 is 6568921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1298651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20260 + ... + 20323.

It is an arithmetic number, because the mean of its divisors is an integer number (213066).

2^1298656 is an apocalyptic number.

1298656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1298656 is a deficient number, since it is larger than the sum of its proper divisors (1258136).

1298656 is an equidigital number, since it uses as much as digits as its factorization.

1298656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40593 (or 40585 counting only the distinct ones).

The product of its digits is 25920, while the sum is 37.

The square root of 1298656 is about 1139.5858896985. The cubic root of 1298656 is about 109.1016642595.

The spelling of 1298656 in words is "one million, two hundred ninety-eight thousand, six hundred fifty-six".