1215263441 has 4 divisors (see below), whose sum is σ = 1388872512. Its totient is φ = 1041654372.

The previous prime is 1215263407. The next prime is 1215263471. The reversal of 1215263441 is 1443625121.

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 a cyclic number.

It is not a de Polignac number, because 1215263441 - 2¹⁸ = 1215001297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1215263471) 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, 86804525 + ... + 86804538.

It is an arithmetic number, because the mean of its divisors is an integer number (347218128).

Almost surely, 2^1215263441 is an apocalyptic number.

It is an amenable number.

1215263441 is a deficient number, since it is larger than the sum of its proper divisors (173609071).

1215263441 is an equidigital number, since it uses as much as digits as its factorization.

1215263441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173609070.

The product of its digits is 5760, while the sum is 29.

The square root of 1215263441 is about 34860.6288095898. The cubic root of 1215263441 is about 1067.1451077103.

Adding to 1215263441 its reverse (1443625121), we get a palindrome (2658888562).

The spelling of 1215263441 in words is "one billion, two hundred fifteen million, two hundred sixty-three thousand, four hundred forty-one".