131424861 has 4 divisors (see below), whose sum is σ = 175233152. Its totient is φ = 87616572.

The previous prime is 131424847. The next prime is 131424863. The reversal of 131424861 is 168424131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 131424861 - 2¹⁰ = 131423837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131424863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21904141 + ... + 21904146.

It is an arithmetic number, because the mean of its divisors is an integer number (43808288).

Almost surely, 2^131424861 is an apocalyptic number.

It is an amenable number.

131424861 is a deficient number, since it is larger than the sum of its proper divisors (43808291).

131424861 is an equidigital number, since it uses as much as digits as its factorization.

131424861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43808290.

The product of its digits is 4608, while the sum is 30.

The square root of 131424861 is about 11464.0682569496. The cubic root of 131424861 is about 508.4237647112.

Adding to 131424861 its reverse (168424131), we get a palindrome (299848992).

The spelling of 131424861 in words is "one hundred thirty-one million, four hundred twenty-four thousand, eight hundred sixty-one".