240670021 has 8 divisors (see below), whose sum is σ = 243079200. Its totient is φ = 238270800.

The previous prime is 240670009. The next prime is 240670061. The reversal of 240670021 is 120076042.

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

It is a cyclic number.

It is not a de Polignac number, because 240670021 - 2⁹ = 240669509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 240669974 and 240670001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240670061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51846 + ... + 56296.

It is an arithmetic number, because the mean of its divisors is an integer number (30384900).

Almost surely, 2^240670021 is an apocalyptic number.

It is an amenable number.

240670021 is a deficient number, since it is larger than the sum of its proper divisors (2409179).

240670021 is a wasteful number, since it uses less digits than its factorization.

240670021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4979.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 240670021 is about 15513.5431478434. The cubic root of 240670021 is about 622.0242724784.

It can be divided in two parts, 2406 and 70021, that added together give a palindrome (72427).

The spelling of 240670021 in words is "two hundred forty million, six hundred seventy thousand, twenty-one".