131147421 has 4 divisors (see below), whose sum is σ = 174863232. Its totient is φ = 87431612.

The previous prime is 131147411. The next prime is 131147459. The reversal of 131147421 is 124741131.

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 not a de Polignac number, because 131147421 - 2⁷ = 131147293 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131147391 and 131147400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131147411) 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, 21857901 + ... + 21857906.

It is an arithmetic number, because the mean of its divisors is an integer number (43715808).

Almost surely, 2^131147421 is an apocalyptic number.

It is an amenable number.

131147421 is a deficient number, since it is larger than the sum of its proper divisors (43715811).

131147421 is an equidigital number, since it uses as much as digits as its factorization.

131147421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43715810.

The product of its digits is 672, while the sum is 24.

The square root of 131147421 is about 11451.9614477172. The cubic root of 131147421 is about 508.0657490798.

Adding to 131147421 its reverse (124741131), we get a palindrome (255888552).

The spelling of 131147421 in words is "one hundred thirty-one million, one hundred forty-seven thousand, four hundred twenty-one".