1216541234 has 16 divisors (see below), whose sum is σ = 1921732800. Its totient is φ = 575992944.

The previous prime is 1216541219. The next prime is 1216541273. The reversal of 1216541234 is 4321456121.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1216541197 and 1216541206.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95747 + ... + 107705.

It is an arithmetic number, because the mean of its divisors is an integer number (120108300).

Almost surely, 2^1216541234 is an apocalyptic number.

1216541234 is a deficient number, since it is larger than the sum of its proper divisors (705191566).

1216541234 is a wasteful number, since it uses less digits than its factorization.

1216541234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14657.

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

The square root of 1216541234 is about 34878.9511596894. The cubic root of 1216541234 is about 1067.5189945193.

Adding to 1216541234 its reverse (4321456121), we get a palindrome (5537997355).

The spelling of 1216541234 in words is "one billion, two hundred sixteen million, five hundred forty-one thousand, two hundred thirty-four".