181004001 has 4 divisors (see below), whose sum is σ = 241338672. Its totient is φ = 120669332.

The previous prime is 181003987. The next prime is 181004099. The reversal of 181004001 is 100400181.

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 181004001 - 2⁵ = 181003969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (181004401) 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, 30167331 + ... + 30167336.

It is an arithmetic number, because the mean of its divisors is an integer number (60334668).

Almost surely, 2^181004001 is an apocalyptic number.

It is an amenable number.

181004001 is a deficient number, since it is larger than the sum of its proper divisors (60334671).

181004001 is an equidigital number, since it uses as much as digits as its factorization.

181004001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60334670.

The product of its (nonzero) digits is 32, while the sum is 15.

The square root of 181004001 is about 13453.7727422459. The cubic root of 181004001 is about 565.6694505567.

Adding to 181004001 its reverse (100400181), we get a palindrome (281404182).

The spelling of 181004001 in words is "one hundred eighty-one million, four thousand, one".