1322731 has 2 divisors, whose sum is σ = 1322732. Its totient is φ = 1322730.

The previous prime is 1322693. The next prime is 1322743. The reversal of 1322731 is 1372231.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1322731 - 2⁹ = 1322219 is a prime.

It is a super-2 number, since 2×1322731² = 3499234596722, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1322699 and 1322708.

It is not a weakly prime, because it can be changed into another prime (1322831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661365 + 661366.

It is an arithmetic number, because the mean of its divisors is an integer number (661366).

2^1322731 is an apocalyptic number.

1322731 is a deficient number, since it is larger than the sum of its proper divisors (1).

1322731 is an equidigital number, since it uses as much as digits as its factorization.

1322731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 252, while the sum is 19.

The square root of 1322731 is about 1150.1004303973. The cubic root of 1322731 is about 109.7717304847.

Adding to 1322731 its reverse (1372231), we get a palindrome (2694962).

The spelling of 1322731 in words is "one million, three hundred twenty-two thousand, seven hundred thirty-one".