1225571 has 2 divisors, whose sum is σ = 1225572. Its totient is φ = 1225570.

The previous prime is 1225559. The next prime is 1225577. The reversal of 1225571 is 1755221.

It is a happy number.

1225571 is an esthetic number in base 11, because in such base its adjacent digits differ by 1.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1225571 - 2⁶ = 1225507 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (1225577) 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, 612785 + 612786.

It is an arithmetic number, because the mean of its divisors is an integer number (612786).

2^1225571 is an apocalyptic number.

1225571 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225571 is an equidigital number, since it uses as much as digits as its factorization.

1225571 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 700, while the sum is 23.

The square root of 1225571 is about 1107.0551025130. The cubic root of 1225571 is about 107.0153703136.

The spelling of 1225571 in words is "one million, two hundred twenty-five thousand, five hundred seventy-one".