1345231 has 2 divisors, whose sum is σ = 1345232. Its totient is φ = 1345230.

The previous prime is 1345229. The next prime is 1345241. The reversal of 1345231 is 1325431.

1345231 = 471² + 472² + ... + 476².

It is a weak prime.

It is an emirp because it is prime and its reverse (1325431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1345231 - 2¹ = 1345229 is a prime.

It is a super-2 number, since 2×1345231² = 3619292886722, which contains 22 as substring.

Together with 1345229, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1345199 and 1345208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1345241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 672615 + 672616.

It is an arithmetic number, because the mean of its divisors is an integer number (672616).

2^1345231 is an apocalyptic number.

1345231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1345231 is an equidigital number, since it uses as much as digits as its factorization.

1345231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 360, while the sum is 19.

The square root of 1345231 is about 1159.8409373703. The cubic root of 1345231 is about 110.3906495879.

The spelling of 1345231 in words is "one million, three hundred forty-five thousand, two hundred thirty-one".