1215452155 has 8 divisors (see below), whose sum is σ = 1466974512. Its totient is φ = 966740448.

The previous prime is 1215452137. The next prime is 1215452177. The reversal of 1215452155 is 5512545121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1215452155 - 2¹¹ = 1215450107 is a prime.

It is a Duffinian 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 7 ways as a sum of consecutive naturals, for example, 701709 + ... + 703438.

It is an arithmetic number, because the mean of its divisors is an integer number (183371814).

Almost surely, 2^1215452155 is an apocalyptic number.

1215452155 is a deficient number, since it is larger than the sum of its proper divisors (251522357).

1215452155 is a wasteful number, since it uses less digits than its factorization.

1215452155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1405325.

The product of its digits is 10000, while the sum is 31.

The square root of 1215452155 is about 34863.3353969467. The cubic root of 1215452155 is about 1067.2003425924.

Adding to 1215452155 its reverse (5512545121), we get a palindrome (6727997276).

The spelling of 1215452155 in words is "one billion, two hundred fifteen million, four hundred fifty-two thousand, one hundred fifty-five".