240023921 has 8 divisors (see below), whose sum is σ = 246871104. Its totient is φ = 233195760.

The previous prime is 240023911. The next prime is 240023933. The reversal of 240023921 is 129320042.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-240023921 is a prime.

It is a super-2 number, since 2×240023921² = 115222965304428482, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (240023911) 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, 23126 + ... + 31856.

It is an arithmetic number, because the mean of its divisors is an integer number (30858888).

Almost surely, 2^240023921 is an apocalyptic number.

It is an amenable number.

240023921 is a deficient number, since it is larger than the sum of its proper divisors (6847183).

240023921 is an equidigital number, since it uses as much as digits as its factorization.

240023921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9511.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 240023921 is about 15492.7054125482. The cubic root of 240023921 is about 621.4671472017.

Adding to 240023921 its reverse (129320042), we get a palindrome (369343963).

The spelling of 240023921 in words is "two hundred forty million, twenty-three thousand, nine hundred twenty-one".