131280905 has 8 divisors (see below), whose sum is σ = 180042432. Its totient is φ = 90021168.

The previous prime is 131280901. The next prime is 131280907. The reversal of 131280905 is 509082131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131280905 - 2² = 131280901 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131280901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1875407 + ... + 1875476.

It is an arithmetic number, because the mean of its divisors is an integer number (22505304).

Almost surely, 2^131280905 is an apocalyptic number.

It is an amenable number.

131280905 is a deficient number, since it is larger than the sum of its proper divisors (48761527).

131280905 is an equidigital number, since it uses as much as digits as its factorization.

131280905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3750895.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 131280905 is about 11457.7879627789. The cubic root of 131280905 is about 508.2380631874.

The spelling of 131280905 in words is "one hundred thirty-one million, two hundred eighty thousand, nine hundred five".