131440142 has 4 divisors (see below), whose sum is σ = 197160216. Its totient is φ = 65720070.

The previous prime is 131440139. The next prime is 131440163. The reversal of 131440142 is 241044131.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32860034 + ... + 32860037.

It is an arithmetic number, because the mean of its divisors is an integer number (49290054).

Almost surely, 2^131440142 is an apocalyptic number.

131440142 is a deficient number, since it is larger than the sum of its proper divisors (65720074).

131440142 is an equidigital number, since it uses as much as digits as its factorization.

131440142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65720073.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 131440142 is about 11464.7347112788. The cubic root of 131440142 is about 508.4434690563.

Adding to 131440142 its reverse (241044131), we get a palindrome (372484273).

The spelling of 131440142 in words is "one hundred thirty-one million, four hundred forty thousand, one hundred forty-two".