1224729 has 24 divisors (see below), whose sum is σ = 1965600. Its totient is φ = 728640.

The previous prime is 1224709. The next prime is 1224739. The reversal of 1224729 is 9274221.

It is not a de Polignac number, because 1224729 - 2⁸ = 1224473 is a prime.

It is a super-2 number, since 2×1224729² = 2999922246882, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1224709) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8742 + ... + 8880.

It is an arithmetic number, because the mean of its divisors is an integer number (81900).

2^1224729 is an apocalyptic number.

It is an amenable number.

1224729 is a deficient number, since it is larger than the sum of its proper divisors (740871).

1224729 is a wasteful number, since it uses less digits than its factorization.

1224729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245 (or 242 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 1224729 is about 1106.6747489665. The cubic root of 1224729 is about 106.9908572268.

It can be divided in two parts, 1224 and 729, that added together give a triangular number (1953 = T₆₂).

The spelling of 1224729 in words is "one million, two hundred twenty-four thousand, seven hundred twenty-nine".