1220265042 has 32 divisors (see below), whose sum is σ = 2553272064. Its totient is φ = 388387200.

The previous prime is 1220265019. The next prime is 1220265043. The reversal of 1220265042 is 2405620221.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1220265043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41209 + ... + 64332.

It is an arithmetic number, because the mean of its divisors is an integer number (79789752).

Almost surely, 2^1220265042 is an apocalyptic number.

1220265042 is an abundant number, since it is smaller than the sum of its proper divisors (1333007022).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1220265042 is a wasteful number, since it uses less digits than its factorization.

1220265042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105634.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 1220265042 is about 34932.2922522986. The cubic root of 1220265042 is about 1068.6071030316.

Adding to 1220265042 its reverse (2405620221), we get a palindrome (3625885263).

The spelling of 1220265042 in words is "one billion, two hundred twenty million, two hundred sixty-five thousand, forty-two".