1225420036 has 27 divisors (see below), whose sum is σ = 2244727093. Its totient is φ = 585300320.

The previous prime is 1225420019. The next prime is 1225420087. The reversal of 1225420036 is 6300245221.

The square root of 1225420036 is 35006.

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., 3218436 + 1222201600 = 1794^2 + 34960^2 .

It is a Duffinian number.

It is an unprimeable number.

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 8 ways as a sum of consecutive naturals, for example, 1609896 + ... + 1610656.

Almost surely, 2^1225420036 is an apocalyptic number.

1225420036 is the 35006-th square number.

It is an amenable number.

1225420036 is a deficient number, since it is larger than the sum of its proper divisors (1019307057).

1225420036 is an frugal number, since it uses more digits than its factorization.

1225420036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1572 (or 786 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The cubic root of 1225420036 is about 1070.1097613550.

Multiplying 1225420036 by its sum of digits (25), we get a square (30635500900 = 175030²).

Adding to 1225420036 its reverse (6300245221), we get a palindrome (7525665257).

The spelling of 1225420036 in words is "one billion, two hundred twenty-five million, four hundred twenty thousand, thirty-six".