131421529 has 2 divisors, whose sum is σ = 131421530. Its totient is φ = 131421528.

The previous prime is 131421527. The next prime is 131421557. The reversal of 131421529 is 925124131.

It is an a-pointer prime, because the next prime (131421557) can be obtained adding 131421529 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93315600 + 38105929 = 9660^2 + 6173^2 .

It is an emirp because it is prime and its reverse (925124131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131421529 - 2¹ = 131421527 is a prime.

Together with 131421527, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 131421497 and 131421506.

It is not a weakly prime, because it can be changed into another prime (131421527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65710764 + 65710765.

It is an arithmetic number, because the mean of its divisors is an integer number (65710765).

Almost surely, 2^131421529 is an apocalyptic number.

It is an amenable number.

131421529 is a deficient number, since it is larger than the sum of its proper divisors (1).

131421529 is an equidigital number, since it uses as much as digits as its factorization.

131421529 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 28.

The square root of 131421529 is about 11463.9229323997. The cubic root of 131421529 is about 508.4194680043.

The spelling of 131421529 in words is "one hundred thirty-one million, four hundred twenty-one thousand, five hundred twenty-nine".