131158705 has 8 divisors (see below), whose sum is σ = 157460904. Its totient is φ = 104880000.

The previous prime is 131158697. The next prime is 131158721. The reversal of 131158705 is 507851131.

It can be written as a sum of positive squares in 4 ways, for example, as 3717184 + 127441521 = 1928^2 + 11289^2 .

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

It is not a de Polignac number, because 131158705 - 2³ = 131158697 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10635 + ... + 19375.

It is an arithmetic number, because the mean of its divisors is an integer number (19682613).

Almost surely, 2^131158705 is an apocalyptic number.

It is an amenable number.

131158705 is a deficient number, since it is larger than the sum of its proper divisors (26302199).

131158705 is an equidigital number, since it uses as much as digits as its factorization.

131158705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11747.

The product of its (nonzero) digits is 4200, while the sum is 31.

The square root of 131158705 is about 11452.4541038155. The cubic root of 131158705 is about 508.0803200856.

The spelling of 131158705 in words is "one hundred thirty-one million, one hundred fifty-eight thousand, seven hundred five".