131032421 has 8 divisors (see below), whose sum is σ = 141295224. Its totient is φ = 120795840.

The previous prime is 131032393. The next prime is 131032441. The reversal of 131032421 is 124230131.

It can be written as a sum of positive squares in 4 ways, for example, as 3568321 + 127464100 = 1889^2 + 11290^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131032421 - 2²⁶ = 63923557 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131032421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131032441) 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 7 ways as a sum of consecutive naturals, for example, 4535 + ... + 16811.

It is an arithmetic number, because the mean of its divisors is an integer number (17661903).

Almost surely, 2^131032421 is an apocalyptic number.

It is an amenable number.

131032421 is a deficient number, since it is larger than the sum of its proper divisors (10262803).

131032421 is a wasteful number, since it uses less digits than its factorization.

131032421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13111.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 131032421 is about 11446.9393726009. The cubic root of 131032421 is about 507.9172021318.

Adding to 131032421 its reverse (124230131), we get a palindrome (255262552).

The spelling of 131032421 in words is "one hundred thirty-one million, thirty-two thousand, four hundred twenty-one".