131421541 has 4 divisors (see below), whose sum is σ = 134217792. Its totient is φ = 128625292.

The previous prime is 131421529. The next prime is 131421557. The reversal of 131421541 is 145124131.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131421541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131428541) 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, 1398055 + ... + 1398148.

It is an arithmetic number, because the mean of its divisors is an integer number (33554448).

It is a Poulet number, since it divides 2^131421540-1.

Almost surely, 2^131421541 is an apocalyptic number.

It is an amenable number.

131421541 is a deficient number, since it is larger than the sum of its proper divisors (2796251).

131421541 is an equidigital number, since it uses as much as digits as its factorization.

131421541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2796250.

The product of its digits is 480, while the sum is 22.

The square root of 131421541 is about 11463.9234557807. The cubic root of 131421541 is about 508.4194834788.

Adding to 131421541 its reverse (145124131), we get a palindrome (276545672).

The spelling of 131421541 in words is "one hundred thirty-one million, four hundred twenty-one thousand, five hundred forty-one".