1216362045 has 16 divisors (see below), whose sum is σ = 2048610240. Its totient is φ = 614582784.

The previous prime is 1216362011. The next prime is 1216362067. The reversal of 1216362045 is 5402636121.

It is not a de Polignac number, because 1216362045 - 2¹⁷ = 1216230973 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2133684 + ... + 2134253.

It is an arithmetic number, because the mean of its divisors is an integer number (128038140).

Almost surely, 2^1216362045 is an apocalyptic number.

1216362045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1216362045 is a deficient number, since it is larger than the sum of its proper divisors (832248195).

1216362045 is a wasteful number, since it uses less digits than its factorization.

1216362045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4267964.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 1216362045 is about 34876.3823381956. The cubic root of 1216362045 is about 1067.4665789638.

Adding to 1216362045 its reverse (5402636121), we get a palindrome (6618998166).

The spelling of 1216362045 in words is "one billion, two hundred sixteen million, three hundred sixty-two thousand, forty-five".