131245451 has 4 divisors (see below), whose sum is σ = 132472152. Its totient is φ = 130018752.

The previous prime is 131245447. The next prime is 131245489. The reversal of 131245451 is 154542131.

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

It is a cyclic number.

It is not a de Polignac number, because 131245451 - 2² = 131245447 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 131245451.

It is not an unprimeable number, because it can be changed into a prime (131245651) 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, 613190 + ... + 613403.

It is an arithmetic number, because the mean of its divisors is an integer number (33118038).

Almost surely, 2^131245451 is an apocalyptic number.

131245451 is a deficient number, since it is larger than the sum of its proper divisors (1226701).

131245451 is a wasteful number, since it uses less digits than its factorization.

131245451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1226700.

The product of its digits is 2400, while the sum is 26.

The square root of 131245451 is about 11456.2407010328. The cubic root of 131245451 is about 508.1923071180.

Adding to 131245451 its reverse (154542131), we get a palindrome (285787582).

The spelling of 131245451 in words is "one hundred thirty-one million, two hundred forty-five thousand, four hundred fifty-one".