131341621 has 4 divisors (see below), whose sum is σ = 132546700. Its totient is φ = 130136544.

The previous prime is 131341591. The next prime is 131341631. The reversal of 131341621 is 126143131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 126143131 = 127 ⋅993253.

It can be written as a sum of positive squares in 2 ways, for example, as 86304100 + 45037521 = 9290^2 + 6711^2 .

It is a cyclic number.

It is not a de Polignac number, because 131341621 - 2²³ = 122953013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131341592 and 131341601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131341631) 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, 602376 + ... + 602593.

It is an arithmetic number, because the mean of its divisors is an integer number (33136675).

Almost surely, 2^131341621 is an apocalyptic number.

It is an amenable number.

131341621 is a deficient number, since it is larger than the sum of its proper divisors (1205079).

131341621 is a wasteful number, since it uses less digits than its factorization.

131341621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1205078.

The product of its digits is 432, while the sum is 22.

The square root of 131341621 is about 11460.4372080650. The cubic root of 131341621 is about 508.3164026491.

Adding to 131341621 its reverse (126143131), we get a palindrome (257484752).

The spelling of 131341621 in words is "one hundred thirty-one million, three hundred forty-one thousand, six hundred twenty-one".