1224731 has 4 divisors (see below), whose sum is σ = 1296792. Its totient is φ = 1152672.

The previous prime is 1224709. The next prime is 1224739. The reversal of 1224731 is 1374221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1374221 = 157 ⋅8753.

It is a cyclic number.

It is not a de Polignac number, because 1224731 - 2¹⁸ = 962587 is a prime.

It is a super-2 number, since 2×1224731² = 2999932044722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1224739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36005 + ... + 36038.

It is an arithmetic number, because the mean of its divisors is an integer number (324198).

2^1224731 is an apocalyptic number.

1224731 is a deficient number, since it is larger than the sum of its proper divisors (72061).

1224731 is an equidigital number, since it uses as much as digits as its factorization.

1224731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72060.

The product of its digits is 336, while the sum is 20.

The square root of 1224731 is about 1106.6756525740. The cubic root of 1224731 is about 106.9909154660.

Adding to 1224731 its reverse (1374221), we get a palindrome (2598952).

The spelling of 1224731 in words is "one million, two hundred twenty-four thousand, seven hundred thirty-one".