131242451 has 4 divisors (see below), whose sum is σ = 131395392. Its totient is φ = 131089512.

The previous prime is 131242417. The next prime is 131242453. The reversal of 131242451 is 154242131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131242451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131242453) 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, 75176 + ... + 76901.

It is an arithmetic number, because the mean of its divisors is an integer number (32848848).

Almost surely, 2^131242451 is an apocalyptic number.

131242451 is a deficient number, since it is larger than the sum of its proper divisors (152941).

131242451 is an equidigital number, since it uses as much as digits as its factorization.

131242451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152940.

The product of its digits is 960, while the sum is 23.

The square root of 131242451 is about 11456.1097672814. The cubic root of 131242451 is about 508.1884350129.

Adding to 131242451 its reverse (154242131), we get a palindrome (285484582).

The spelling of 131242451 in words is "one hundred thirty-one million, two hundred forty-two thousand, four hundred fifty-one".