131004001 has 4 divisors (see below), whose sum is σ = 131346432. Its totient is φ = 130661572.

The previous prime is 131003987. The next prime is 131004011. The reversal of 131004001 is 100400131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 131004001 - 2¹⁵ = 130971233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131004011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170641 + ... + 171406.

It is an arithmetic number, because the mean of its divisors is an integer number (32836608).

Almost surely, 2^131004001 is an apocalyptic number.

It is an amenable number.

131004001 is a deficient number, since it is larger than the sum of its proper divisors (342431).

131004001 is an equidigital number, since it uses as much as digits as its factorization.

131004001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342430.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 131004001 is about 11445.6979254216. The cubic root of 131004001 is about 507.8804782673.

Adding to 131004001 its reverse (100400131), we get a palindrome (231404132).

The spelling of 131004001 in words is "one hundred thirty-one million, four thousand, one".