1226531 has 2 divisors, whose sum is σ = 1226532. Its totient is φ = 1226530.

The previous prime is 1226503. The next prime is 1226539. The reversal of 1226531 is 1356221.

It is a strong prime.

It is an emirp because it is prime and its reverse (1356221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1226531 - 2¹⁰ = 1225507 is a prime.

It is a super-2 number, since 2×1226531² = 3008756587922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1226539) 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, 613265 + 613266.

It is an arithmetic number, because the mean of its divisors is an integer number (613266).

2^1226531 is an apocalyptic number.

1226531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1226531 is an equidigital number, since it uses as much as digits as its factorization.

1226531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 360, while the sum is 20.

The square root of 1226531 is about 1107.4886003928. The cubic root of 1226531 is about 107.0433050321.

The spelling of 1226531 in words is "one million, two hundred twenty-six thousand, five hundred thirty-one".