1215405510241 has 4 divisors (see below), whose sum is σ = 1308898241812. Its totient is φ = 1121912778672.

The previous prime is 1215405510217. The next prime is 1215405510257. The reversal of 1215405510241 is 1420155045121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 385894409616 + 829511100625 = 621204^2 + 910775^2 .

It is a cyclic number.

It is not a de Polignac number, because 1215405510241 - 2¹⁷ = 1215405379169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1215405510281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46746365766 + ... + 46746365791.

It is an arithmetic number, because the mean of its divisors is an integer number (327224560453).

Almost surely, 2^{1215405510241} is an apocalyptic number.

It is an amenable number.

1215405510241 is a deficient number, since it is larger than the sum of its proper divisors (93492731571).

1215405510241 is an equidigital number, since it uses as much as digits as its factorization.

1215405510241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93492731570.

The product of its (nonzero) digits is 8000, while the sum is 31.

The spelling of 1215405510241 in words is "one trillion, two hundred fifteen billion, four hundred five million, five hundred ten thousand, two hundred forty-one".