1031231 has 2 divisors, whose sum is σ = 1031232. Its totient is φ = 1031230.

The previous prime is 1031189. The next prime is 1031267. The reversal of 1031231 is 1321301.

It is a strong prime.

It is an emirp because it is prime and its reverse (1321301) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1031231 is a prime.

It is a super-2 number, since 2×1031231² = 2126874750722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1031281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 515615 + 515616.

It is an arithmetic number, because the mean of its divisors is an integer number (515616).

2^1031231 is an apocalyptic number.

1031231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1031231 is an equidigital number, since it uses as much as digits as its factorization.

1031231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 1031231 is about 1015.4954455831. The cubic root of 1031231 is about 101.0303800385.

Adding to 1031231 its reverse (1321301), we get a palindrome (2352532).

The spelling of 1031231 in words is "one million, thirty-one thousand, two hundred thirty-one".