131440129 has 8 divisors (see below), whose sum is σ = 133056288. Its totient is φ = 129833760.

The previous prime is 131440117. The next prime is 131440139. The reversal of 131440129 is 921044131.

It is a happy number.

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 131440129 - 2⁹ = 131439617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131440139) 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, 26634 + ... + 31180.

It is an arithmetic number, because the mean of its divisors is an integer number (16632036).

Almost surely, 2^131440129 is an apocalyptic number.

It is an amenable number.

131440129 is a deficient number, since it is larger than the sum of its proper divisors (1616159).

131440129 is a wasteful number, since it uses less digits than its factorization.

131440129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4895.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 131440129 is about 11464.7341443228. The cubic root of 131440129 is about 508.4434522939.

The spelling of 131440129 in words is "one hundred thirty-one million, four hundred forty thousand, one hundred twenty-nine".