131434421 has 2 divisors, whose sum is σ = 131434422. Its totient is φ = 131434420.

The previous prime is 131434379. The next prime is 131434441. The reversal of 131434421 is 124434131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83631025 + 47803396 = 9145^2 + 6914^2 .

It is a cyclic number.

It is not a de Polignac number, because 131434421 - 2⁶ = 131434357 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131434441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65717210 + 65717211.

It is an arithmetic number, because the mean of its divisors is an integer number (65717211).

Almost surely, 2^131434421 is an apocalyptic number.

It is an amenable number.

131434421 is a deficient number, since it is larger than the sum of its proper divisors (1).

131434421 is an equidigital number, since it uses as much as digits as its factorization.

131434421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152, while the sum is 23.

The square root of 131434421 is about 11464.4852043169. The cubic root of 131434421 is about 508.4360921945.

Adding to 131434421 its reverse (124434131), we get a palindrome (255868552).

The spelling of 131434421 in words is "one hundred thirty-one million, four hundred thirty-four thousand, four hundred twenty-one".