131658742 has 4 divisors (see below), whose sum is σ = 197488116. Its totient is φ = 65829370.

The previous prime is 131658721. The next prime is 131658743. The reversal of 131658742 is 247856131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 247856131 = 1279 ⋅193789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131658743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32914684 + ... + 32914687.

It is an arithmetic number, because the mean of its divisors is an integer number (49372029).

Almost surely, 2^131658742 is an apocalyptic number.

131658742 is a deficient number, since it is larger than the sum of its proper divisors (65829374).

131658742 is an equidigital number, since it uses as much as digits as its factorization.

131658742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65829373.

The product of its digits is 40320, while the sum is 37.

The square root of 131658742 is about 11474.2643337166. The cubic root of 131658742 is about 508.7251795025.

The spelling of 131658742 in words is "one hundred thirty-one million, six hundred fifty-eight thousand, seven hundred forty-two".