1225449 has 21 divisors (see below), whose sum is σ = 1883239.
Its totient is φ = 797040.
The previous prime is 1225409. The next prime is 1225459. The reversal of 1225449 is 9445221.
The square root of 1225449 is 1107.
It is a perfect power (a square), and thus also a powerful number.
It can be written as a sum of positive squares in only one way, i.e., 59049 + 1166400 = 243^2 + 1080^2
It is not a de Polignac number, because 1225449 - 217 = 1094377 is a prime.
It is a Harshad number since it is a multiple of its sum of digits (27).
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (1225409) 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 20 ways as a sum of consecutive naturals, for example, 29869 + ... + 29909.
21225449 is an apocalyptic number.
1225449 is the 1107-th square number.
1225449 is the 554-th centered octagonal number.
It is an amenable number.
1225449 is a deficient number, since it is larger than the sum of its proper divisors (657790).
1225449 is an frugal number, since it uses more digits than its factorization.
1225449 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 100 (or 44 counting only the distinct ones).
The product of its digits is 2880, while the sum is 27.
The cubic root of 1225449 is about 107.0118192319.
The spelling of 1225449 in words is "one million, two hundred twenty-five thousand, four hundred forty-nine".