1220545452 has 48 divisors (see below), whose sum is σ = 3262436352. Its totient is φ = 347907840.

The previous prime is 1220545433. The next prime is 1220545453. The reversal of 1220545452 is 2545450221.

It is not an unprimeable number, because it can be changed into a prime (1220545453) 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 15 ways as a sum of consecutive naturals, for example, 19348 + ... + 53060.

It is an arithmetic number, because the mean of its divisors is an integer number (67967424).

Almost surely, 2^1220545452 is an apocalyptic number.

1220545452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1220545452 is an abundant number, since it is smaller than the sum of its proper divisors (2041890900).

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

1220545452 is a wasteful number, since it uses less digits than its factorization.

1220545452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34158 (or 34156 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 30.

The square root of 1220545452 is about 34936.3056432703. The cubic root of 1220545452 is about 1068.6889500506.

Adding to 1220545452 its reverse (2545450221), we get a palindrome (3765995673).

The spelling of 1220545452 in words is "one billion, two hundred twenty million, five hundred forty-five thousand, four hundred fifty-two".