131216742 has 12 divisors (see below), whose sum is σ = 284302980. Its totient is φ = 43738908.

The previous prime is 131216741. The next prime is 131216759. The reversal of 131216742 is 247612131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131216741) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3644892 + ... + 3644927.

It is an arithmetic number, because the mean of its divisors is an integer number (23691915).

Almost surely, 2^131216742 is an apocalyptic number.

131216742 is an abundant number, since it is smaller than the sum of its proper divisors (153086238).

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

131216742 is a wasteful number, since it uses less digits than its factorization.

131216742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7289827 (or 7289824 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 131216742 is about 11454.9876473089. The cubic root of 131216742 is about 508.1552499431.

Adding to 131216742 its reverse (247612131), we get a palindrome (378828873).

The spelling of 131216742 in words is "one hundred thirty-one million, two hundred sixteen thousand, seven hundred forty-two".