1226571 has 4 divisors (see below), whose sum is σ = 1635432. Its totient is φ = 817712.

The previous prime is 1226557. The next prime is 1226581. The reversal of 1226571 is 1756221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1226571 - 2⁵ = 1226539 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (1226501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 204426 + ... + 204431.

It is an arithmetic number, because the mean of its divisors is an integer number (408858).

2^1226571 is an apocalyptic number.

1226571 is a deficient number, since it is larger than the sum of its proper divisors (408861).

1226571 is an equidigital number, since it uses as much as digits as its factorization.

1226571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408860.

The product of its digits is 840, while the sum is 24.

The square root of 1226571 is about 1107.5066591222. The cubic root of 1226571 is about 107.0444686624.

The spelling of 1226571 in words is "one million, two hundred twenty-six thousand, five hundred seventy-one".