1266231 has 4 divisors (see below), whose sum is σ = 1688312. Its totient is φ = 844152.

The previous prime is 1266229. The next prime is 1266241. The reversal of 1266231 is 1326621.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1326621 = 3 ⋅442207.

It is not a de Polignac number, because 1266231 - 2¹ = 1266229 is a prime.

It is a super-2 number, since 2×1266231² = 3206681890722, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1266198 and 1266207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266241) 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 in 3 ways as a sum of consecutive naturals, for example, 211036 + ... + 211041.

It is an arithmetic number, because the mean of its divisors is an integer number (422078).

2^1266231 is an apocalyptic number.

1266231 is a deficient number, since it is larger than the sum of its proper divisors (422081).

1266231 is an equidigital number, since it uses as much as digits as its factorization.

1266231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422080.

The product of its digits is 432, while the sum is 21.

The square root of 1266231 is about 1125.2693011009. The cubic root of 1266231 is about 108.1859792799.

The spelling of 1266231 in words is "one million, two hundred sixty-six thousand, two hundred thirty-one".