1215265445 has 16 divisors (see below), whose sum is σ = 1514661120. Its totient is φ = 934920000.

The previous prime is 1215265439. The next prime is 1215265477. The reversal of 1215265445 is 5445625121.

It is a de Polignac number, because none of the positive numbers 2^k-1215265445 is a prime.

It is a super-2 number, since 2×1215265445² = 2953740203622096050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19700 + ... + 53090.

It is an arithmetic number, because the mean of its divisors is an integer number (94666320).

Almost surely, 2^1215265445 is an apocalyptic number.

It is an amenable number.

1215265445 is a deficient number, since it is larger than the sum of its proper divisors (299395675).

1215265445 is a wasteful number, since it uses less digits than its factorization.

1215265445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33676.

The product of its digits is 48000, while the sum is 35.

The square root of 1215265445 is about 34860.6575526051. The cubic root of 1215265445 is about 1067.1456942930.

The spelling of 1215265445 in words is "one billion, two hundred fifteen million, two hundred sixty-five thousand, four hundred forty-five".