1225447 has 4 divisors (see below), whose sum is σ = 1227760. Its totient is φ = 1223136.

The previous prime is 1225409. The next prime is 1225459. The reversal of 1225447 is 7445221.

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 1225447 - 2⁷ = 1225319 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223447) 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, 79 + ... + 1567.

It is an arithmetic number, because the mean of its divisors is an integer number (306940).

2^1225447 is an apocalyptic number.

1225447 is a deficient number, since it is larger than the sum of its proper divisors (2313).

1225447 is an equidigital number, since it uses as much as digits as its factorization.

1225447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2312.

The product of its digits is 2240, while the sum is 25.

The square root of 1225447 is about 1106.9990966573. Note that the first 3 decimals coincide. The cubic root of 1225447 is about 107.0117610154.

The spelling of 1225447 in words is "one million, two hundred twenty-five thousand, four hundred forty-seven".