240001 has 4 divisors (see below), whose sum is σ = 242352. Its totient is φ = 237652.

The previous prime is 239999. The next prime is 240007. The reversal of 240001 is 100042.

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, and also an emirpimes, since its reverse is a distinct semiprime: 100042 = 2 ⋅50021.

It is a cyclic number.

It is not a de Polignac number, because 240001 - 2¹ = 239999 is a prime.

It is an Ulam number.

It is a Duffinian number.

240001 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (240007) 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, 1015 + ... + 1228.

It is an arithmetic number, because the mean of its divisors is an integer number (60588).

2²⁴⁰⁰⁰¹ is an apocalyptic number.

It is an amenable number.

240001 is a deficient number, since it is larger than the sum of its proper divisors (2351).

240001 is a wasteful number, since it uses less digits than its factorization.

240001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2350.

The product of its (nonzero) digits is 8, while the sum is 7.

The square root of 240001 is about 489.8989691763. The cubic root of 240001 is about 62.1447364310.

Adding to 240001 its reverse (100042), we get a palindrome (340043).

The spelling of 240001 in words is "two hundred forty thousand, one", and thus it is an iban number.