1216262541 has 8 divisors (see below), whose sum is σ = 1746428320. Its totient is φ = 748469232.

The previous prime is 1216262527. The next prime is 1216262627. The reversal of 1216262541 is 1452626121.

1216262541 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 1216262541 - 2¹⁰ = 1216261517 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1216262499 and 1216262508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216262441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15593071 + ... + 15593148.

It is an arithmetic number, because the mean of its divisors is an integer number (218303540).

Almost surely, 2^1216262541 is an apocalyptic number.

It is an amenable number.

1216262541 is a deficient number, since it is larger than the sum of its proper divisors (530165779).

1216262541 is a wasteful number, since it uses less digits than its factorization.

1216262541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31186235.

The product of its digits is 5760, while the sum is 30.

The square root of 1216262541 is about 34874.9557849182. The cubic root of 1216262541 is about 1067.4374702810.

Adding to 1216262541 its reverse (1452626121), we get a palindrome (2668888662).

The spelling of 1216262541 in words is "one billion, two hundred sixteen million, two hundred sixty-two thousand, five hundred forty-one".