1222731 has 6 divisors (see below), whose sum is σ = 1766180. Its totient is φ = 815148.

The previous prime is 1222729. The next prime is 1222751. The reversal of 1222731 is 1372221.

It is not a de Polignac number, because 1222731 - 2¹ = 1222729 is a prime.

It is a super-2 number, since 2×1222731² = 2990142196722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1222751) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 67921 + ... + 67938.

2^1222731 is an apocalyptic number.

1222731 is a deficient number, since it is larger than the sum of its proper divisors (543449).

1222731 is a wasteful number, since it uses less digits than its factorization.

1222731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135865 (or 135862 counting only the distinct ones).

The product of its digits is 168, while the sum is 18.

The square root of 1222731 is about 1105.7716762515. The cubic root of 1222731 is about 106.9326445980.

Adding to 1222731 its reverse (1372221), we get a palindrome (2594952).

It can be divided in two parts, 1222 and 731, that added together give a triangular number (1953 = T₆₂).

The spelling of 1222731 in words is "one million, two hundred twenty-two thousand, seven hundred thirty-one".