1422421225 has 27 divisors (see below), whose sum is σ = 1866220677. Its totient is φ = 1075330080.

The previous prime is 1422421219. The next prime is 1422421237. The reversal of 1422421225 is 5221242241.

It is a happy number.

The square root of 1422421225 is 37715.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 1432809 + 1420988416 = 1197^2 + 37696^2 .

It is not a de Polignac number, because 1422421225 - 2⁷ = 1422421097 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1422421225.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 3582727 + ... + 3583123.

Almost surely, 2^1422421225 is an apocalyptic number.

1422421225 is the 37715-th square number.

1422421225 is the 18858-th centered octagonal number.

It is an amenable number.

1422421225 is a deficient number, since it is larger than the sum of its proper divisors (443799452).

1422421225 is an frugal number, since it uses more digits than its factorization.

1422421225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 842 (or 421 counting only the distinct ones).

The product of its digits is 2560, while the sum is 25.

The cubic root of 1422421225 is about 1124.6293363238.

Multiplying 1422421225 by its sum of digits (25), we get a square (35560530625 = 188575²).

1422421225 divided by its sum of digits (25) gives a square (56896849 = 7543²).

Adding to 1422421225 its reverse (5221242241), we get a palindrome (6643663466).

The spelling of 1422421225 in words is "one billion, four hundred twenty-two million, four hundred twenty-one thousand, two hundred twenty-five".