131003421 has 16 divisors (see below), whose sum is σ = 180824064. Its totient is φ = 84297024.

The previous prime is 131003419. The next prime is 131003441. The reversal of 131003421 is 124300131.

It is not a de Polignac number, because 131003421 - 2¹ = 131003419 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131003421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131003401) 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 in 15 ways as a sum of consecutive naturals, for example, 9451 + ... + 18743.

It is an arithmetic number, because the mean of its divisors is an integer number (11301504).

Almost surely, 2^131003421 is an apocalyptic number.

It is an amenable number.

131003421 is a deficient number, since it is larger than the sum of its proper divisors (49820643).

131003421 is a wasteful number, since it uses less digits than its factorization.

131003421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9460.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 131003421 is about 11445.6725883628. The cubic root of 131003421 is about 507.8797287453.

Adding to 131003421 its reverse (124300131), we get a palindrome (255303552).

The spelling of 131003421 in words is "one hundred thirty-one million, three thousand, four hundred twenty-one".