1215848253 has 4 divisors (see below), whose sum is σ = 1621131008. Its totient is φ = 810565500.

The previous prime is 1215848251. The next prime is 1215848261. The reversal of 1215848253 is 3528485121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1215848253 - 2¹ = 1215848251 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 (1215848251) 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 3 ways as a sum of consecutive naturals, for example, 202641373 + ... + 202641378.

It is an arithmetic number, because the mean of its divisors is an integer number (405282752).

Almost surely, 2^1215848253 is an apocalyptic number.

It is an amenable number.

1215848253 is a deficient number, since it is larger than the sum of its proper divisors (405282755).

1215848253 is an equidigital number, since it uses as much as digits as its factorization.

1215848253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405282754.

The product of its digits is 76800, while the sum is 39.

The square root of 1215848253 is about 34869.0156586044. The cubic root of 1215848253 is about 1067.3162583057.

The spelling of 1215848253 in words is "one billion, two hundred fifteen million, eight hundred forty-eight thousand, two hundred fifty-three".