131242542 has 16 divisors (see below), whose sum is σ = 265808640. Its totient is φ = 43193592.

The previous prime is 131242541. The next prime is 131242571. The reversal of 131242542 is 245242131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131242541) 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, 137968 + ... + 138915.

It is an arithmetic number, because the mean of its divisors is an integer number (16613040).

Almost surely, 2^131242542 is an apocalyptic number.

131242542 is an abundant number, since it is smaller than the sum of its proper divisors (134566098).

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

131242542 is a wasteful number, since it uses less digits than its factorization.

131242542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276967.

The product of its digits is 1920, while the sum is 24.

The square root of 131242542 is about 11456.1137389605. The cubic root of 131242542 is about 508.1885524676.

Adding to 131242542 its reverse (245242131), we get a palindrome (376484673).

The spelling of 131242542 in words is "one hundred thirty-one million, two hundred forty-two thousand, five hundred forty-two".