1215240053 has 8 divisors (see below), whose sum is σ = 1287128088. Its totient is φ = 1143396864.

The previous prime is 1215240031. The next prime is 1215240067. The reversal of 1215240053 is 3500425121.

It can be written as a sum of positive squares in 4 ways, for example, as 412821124 + 802418929 = 20318^2 + 28327^2 .

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 1215240053 - 2⁸ = 1215239797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215240253) by changing a digit.

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, 56225 + ... + 74777.

It is an arithmetic number, because the mean of its divisors is an integer number (160891011).

Almost surely, 2^1215240053 is an apocalyptic number.

It is an amenable number.

1215240053 is a deficient number, since it is larger than the sum of its proper divisors (71888035).

1215240053 is a wasteful number, since it uses less digits than its factorization.

1215240053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22423.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 1215240053 is about 34860.2933579165. The cubic root of 1215240053 is about 1067.1382618558.

Adding to 1215240053 its reverse (3500425121), we get a palindrome (4715665174).

The spelling of 1215240053 in words is "one billion, two hundred fifteen million, two hundred forty thousand, fifty-three".