131865061 has 4 divisors (see below), whose sum is σ = 135081324. Its totient is φ = 128648800.

The previous prime is 131865053. The next prime is 131865089. The reversal of 131865061 is 160568131.

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

It can be written as a sum of positive squares in 2 ways, for example, as 35628961 + 96236100 = 5969^2 + 9810^2 .

It is a cyclic number.

It is not a de Polignac number, because 131865061 - 2³ = 131865053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131865031) 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, 1608070 + ... + 1608151.

It is an arithmetic number, because the mean of its divisors is an integer number (33770331).

Almost surely, 2^131865061 is an apocalyptic number.

It is an amenable number.

131865061 is a deficient number, since it is larger than the sum of its proper divisors (3216263).

131865061 is an equidigital number, since it uses as much as digits as its factorization.

131865061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3216262.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 131865061 is about 11483.2513252998. The cubic root of 131865061 is about 508.9907774919.

The spelling of 131865061 in words is "one hundred thirty-one million, eight hundred sixty-five thousand, sixty-one".