131132405 has 4 divisors (see below), whose sum is σ = 157358892. Its totient is φ = 104905920.

The previous prime is 131132399. The next prime is 131132411. The reversal of 131132405 is 504231131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 504231131 = 211 ⋅2389721.

It is an interprime number because it is at equal distance from previous prime (131132399) and next prime (131132411).

It can be written as a sum of positive squares in 2 ways, for example, as 43784689 + 87347716 = 6617^2 + 9346^2 .

It is not a de Polignac number, because 131132405 - 2⁸ = 131132149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13113236 + ... + 13113245.

It is an arithmetic number, because the mean of its divisors is an integer number (39339723).

Almost surely, 2^131132405 is an apocalyptic number.

It is an amenable number.

131132405 is a deficient number, since it is larger than the sum of its proper divisors (26226487).

131132405 is an equidigital number, since it uses as much as digits as its factorization.

131132405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26226486.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 131132405 is about 11451.3058207350. The cubic root of 131132405 is about 508.0463576539.

Adding to 131132405 its reverse (504231131), we get a palindrome (635363536).

The spelling of 131132405 in words is "one hundred thirty-one million, one hundred thirty-two thousand, four hundred five".