131421441 has 16 divisors (see below), whose sum is σ = 190064448. Its totient is φ = 80448000.

The previous prime is 131421439. The next prime is 131421457. The reversal of 131421441 is 144124131.

It is not a de Polignac number, because 131421441 - 2¹ = 131421439 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131421401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29335 + ... + 33516.

It is an arithmetic number, because the mean of its divisors is an integer number (11879028).

Almost surely, 2^131421441 is an apocalyptic number.

It is an amenable number.

131421441 is a deficient number, since it is larger than the sum of its proper divisors (58643007).

131421441 is a wasteful number, since it uses less digits than its factorization.

131421441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62912.

The product of its digits is 384, while the sum is 21.

The square root of 131421441 is about 11463.9190942714. The cubic root of 131421441 is about 508.4193545249.

Adding to 131421441 its reverse (144124131), we get a palindrome (275545572).

The spelling of 131421441 in words is "one hundred thirty-one million, four hundred twenty-one thousand, four hundred forty-one".