131640042 has 16 divisors (see below), whose sum is σ = 263450880. Its totient is φ = 43851552.

The previous prime is 131640031. The next prime is 131640049. The reversal of 131640042 is 240046131.

It is not an unprimeable number, because it can be changed into a prime (131640049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4318 + ... + 16790.

It is an arithmetic number, because the mean of its divisors is an integer number (16465680).

Almost surely, 2^131640042 is an apocalyptic number.

131640042 is an abundant number, since it is smaller than the sum of its proper divisors (131810838).

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

131640042 is a wasteful number, since it uses less digits than its factorization.

131640042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14237.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 131640042 is about 11473.4494377236. The cubic root of 131640042 is about 508.7010929610.

Adding to 131640042 its reverse (240046131), we get a palindrome (371686173).

The spelling of 131640042 in words is "one hundred thirty-one million, six hundred forty thousand, forty-two".