131241599 has 4 divisors (see below), whose sum is σ = 132468264. Its totient is φ = 130014936.

The previous prime is 131241571. The next prime is 131241601. The reversal of 131241599 is 995142131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 995142131 = 487 ⋅2043413.

It is a cyclic number.

It is not a de Polignac number, because 131241599 - 2²⁰ = 130193023 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 (131244599) 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, 613172 + ... + 613385.

It is an arithmetic number, because the mean of its divisors is an integer number (33117066).

Almost surely, 2^131241599 is an apocalyptic number.

131241599 is a deficient number, since it is larger than the sum of its proper divisors (1226665).

131241599 is a wasteful number, since it uses less digits than its factorization.

131241599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1226664.

The product of its digits is 9720, while the sum is 35.

The square root of 131241599 is about 11456.0725818231. The cubic root of 131241599 is about 508.1873353243.

The spelling of 131241599 in words is "one hundred thirty-one million, two hundred forty-one thousand, five hundred ninety-nine".