131241421 has 2 divisors, whose sum is σ = 131241422. Its totient is φ = 131241420.

The previous prime is 131241413. The next prime is 131241449. The reversal of 131241421 is 124142131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 109432521 + 21808900 = 10461^2 + 4670^2 .

It is an emirp because it is prime and its reverse (124142131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131241421 - 2³ = 131241413 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131241401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65620710 + 65620711.

It is an arithmetic number, because the mean of its divisors is an integer number (65620711).

Almost surely, 2^131241421 is an apocalyptic number.

It is an amenable number.

131241421 is a deficient number, since it is larger than the sum of its proper divisors (1).

131241421 is an equidigital number, since it uses as much as digits as its factorization.

131241421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 192, while the sum is 19.

The square root of 131241421 is about 11456.0648130150. The cubic root of 131241421 is about 508.1871055765.

Adding to 131241421 its reverse (124142131), we get a palindrome (255383552).

The spelling of 131241421 in words is "one hundred thirty-one million, two hundred forty-one thousand, four hundred twenty-one".