1296224 has 12 divisors (see below), whose sum is σ = 2552004. Its totient is φ = 648096.

The previous prime is 1296209. The next prime is 1296227. The reversal of 1296224 is 4226921.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1296193 and 1296202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1296227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20222 + ... + 20285.

It is an arithmetic number, because the mean of its divisors is an integer number (212667).

2^1296224 is an apocalyptic number.

It is an amenable number.

1296224 is a deficient number, since it is larger than the sum of its proper divisors (1255780).

1296224 is an equidigital number, since it uses as much as digits as its factorization.

1296224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40517 (or 40509 counting only the distinct ones).

The product of its digits is 1728, while the sum is 26.

The square root of 1296224 is about 1138.5183353816. The cubic root of 1296224 is about 109.0335166126.

The spelling of 1296224 in words is "one million, two hundred ninety-six thousand, two hundred twenty-four".