131274787 has 4 divisors (see below), whose sum is σ = 150028336. Its totient is φ = 112521240.

The previous prime is 131274761. The next prime is 131274817. The reversal of 131274787 is 787472131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 787472131 = 4219 ⋅186649.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131274787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131275787) 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 3 ways as a sum of consecutive naturals, for example, 9376764 + ... + 9376777.

It is an arithmetic number, because the mean of its divisors is an integer number (37507084).

Almost surely, 2^131274787 is an apocalyptic number.

131274787 is a deficient number, since it is larger than the sum of its proper divisors (18753549).

131274787 is an equidigital number, since it uses as much as digits as its factorization.

131274787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18753548.

The product of its digits is 65856, while the sum is 40.

The square root of 131274787 is about 11457.5209796884. The cubic root of 131274787 is about 508.2301680337.

The spelling of 131274787 in words is "one hundred thirty-one million, two hundred seventy-four thousand, seven hundred eighty-seven".