1220265025 has 24 divisors (see below), whose sum is σ = 1820310080. Its totient is φ = 792711360.

The previous prime is 1220265019. The next prime is 1220265043. The reversal of 1220265025 is 5205620221.

It is a happy number.

It is not a de Polignac number, because 1220265025 - 2⁷ = 1220264897 is a prime.

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

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 180174 + ... + 186823.

Almost surely, 2^1220265025 is an apocalyptic number.

It is an amenable number.

1220265025 is a deficient number, since it is larger than the sum of its proper divisors (600045055).

1220265025 is a wasteful number, since it uses less digits than its factorization.

1220265025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367033 (or 367028 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1220265025 is about 34932.2920089707. The cubic root of 1220265025 is about 1068.6070980692.

Adding to 1220265025 its reverse (5205620221), we get a palindrome (6425885246).

The spelling of 1220265025 in words is "one billion, two hundred twenty million, two hundred sixty-five thousand, twenty-five".