131520041 has 4 divisors (see below), whose sum is σ = 139256532. Its totient is φ = 123783552.

The previous prime is 131520031. The next prime is 131520097. The reversal of 131520041 is 140025131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 140025131 = 37 ⋅3784463.

It can be written as a sum of positive squares in 2 ways, for example, as 113635600 + 17884441 = 10660^2 + 4229^2 .

It is a cyclic number.

It is not a de Polignac number, because 131520041 - 2¹⁴ = 131503657 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 7736473 = 131520041 / (1 + 3 + 1 + 5 + 2 + 0 + 0 + 4 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131520031) 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, 3868220 + ... + 3868253.

It is an arithmetic number, because the mean of its divisors is an integer number (34814133).

Almost surely, 2^131520041 is an apocalyptic number.

It is an amenable number.

131520041 is a deficient number, since it is larger than the sum of its proper divisors (7736491).

131520041 is an equidigital number, since it uses as much as digits as its factorization.

131520041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7736490.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 131520041 is about 11468.2187370140. The cubic root of 131520041 is about 508.5464713189.

Adding to 131520041 its reverse (140025131), we get a palindrome (271545172).

The spelling of 131520041 in words is "one hundred thirty-one million, five hundred twenty thousand, forty-one".