1225567 has 4 divisors (see below), whose sum is σ = 1400656. Its totient is φ = 1050480.

The previous prime is 1225559. The next prime is 1225571. The reversal of 1225567 is 7655221.

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 1225567 - 2³ = 1225559 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87534 + ... + 87547.

It is an arithmetic number, because the mean of its divisors is an integer number (350164).

2^1225567 is an apocalyptic number.

1225567 is a deficient number, since it is larger than the sum of its proper divisors (175089).

1225567 is an equidigital number, since it uses as much as digits as its factorization.

1225567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175088.

The product of its digits is 4200, while the sum is 28.

The square root of 1225567 is about 1107.0532959167. The cubic root of 1225567 is about 107.0152538884.

The spelling of 1225567 in words is "one million, two hundred twenty-five thousand, five hundred sixty-seven".