1216141542 has 96 divisors (see below), whose sum is σ = 3292233984. Its totient is φ = 315201600.

The previous prime is 1216141541. The next prime is 1216141547. The reversal of 1216141542 is 2451416121.

1216141542 is a `hidden beast` number, since 1 + 2 + 1 + 614 + 1 + 5 + 42 = 666.

1216141542 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216141541) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1145692 + ... + 1146752.

It is an arithmetic number, because the mean of its divisors is an integer number (34294104).

Almost surely, 2^1216141542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1216141542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1646116992).

1216141542 is an abundant number, since it is smaller than the sum of its proper divisors (2076092442).

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

1216141542 is a wasteful number, since it uses less digits than its factorization.

1216141542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1914 (or 1911 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 1216141542 is about 34873.2209868833. The cubic root of 1216141542 is about 1067.4020713586.

Adding to 1216141542 its reverse (2451416121), we get a palindrome (3667557663).

The spelling of 1216141542 in words is "one billion, two hundred sixteen million, one hundred forty-one thousand, five hundred forty-two".