1216632042 has 16 divisors (see below), whose sum is σ = 2703626880. Its totient is φ = 405543996.

The previous prime is 1216632031. The next prime is 1216632059. The reversal of 1216632042 is 2402366121.

1216632042 is a `hidden beast` number, since 1 + 21 + 6 + 632 + 0 + 4 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 1216631997 and 1216632015.

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, 11265058 + ... + 11265165.

It is an arithmetic number, because the mean of its divisors is an integer number (168976680).

Almost surely, 2^1216632042 is an apocalyptic number.

1216632042 is an abundant number, since it is smaller than the sum of its proper divisors (1486994838).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1216632042 is a wasteful number, since it uses less digits than its factorization.

1216632042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22530234 (or 22530228 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 1216632042 is about 34880.2528947254. The cubic root of 1216632042 is about 1067.5455552995.

Adding to 1216632042 its reverse (2402366121), we get a palindrome (3618998163).

The spelling of 1216632042 in words is "one billion, two hundred sixteen million, six hundred thirty-two thousand, forty-two".