1215569045 has 16 divisors (see below), whose sum is σ = 1489415040. Its totient is φ = 952046784.

The previous prime is 1215569041. The next prime is 1215569053. The reversal of 1215569045 is 5409655121.

1215569045 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 1215569045 - 2² = 1215569041 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215569041) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 124346 + ... + 133764.

It is an arithmetic number, because the mean of its divisors is an integer number (93088440).

Almost surely, 2^1215569045 is an apocalyptic number.

It is an amenable number.

1215569045 is a deficient number, since it is larger than the sum of its proper divisors (273845995).

1215569045 is an equidigital number, since it uses as much as digits as its factorization.

1215569045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9964.

The product of its (nonzero) digits is 54000, while the sum is 38.

The square root of 1215569045 is about 34865.0117596424. The cubic root of 1215569045 is about 1067.2345523715.

The spelling of 1215569045 in words is "one billion, two hundred fifteen million, five hundred sixty-nine thousand, forty-five".