243420001 has 8 divisors (see below), whose sum is σ = 279525600. Its totient is φ = 209643840.

The previous prime is 243419989. The next prime is 243420041. The reversal of 243420001 is 100024342.

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 243420001 - 2⁹ = 243419489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243420041) 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, 582136 + ... + 582553.

It is an arithmetic number, because the mean of its divisors is an integer number (34940700).

Almost surely, 2^243420001 is an apocalyptic number.

It is an amenable number.

243420001 is a deficient number, since it is larger than the sum of its proper divisors (36105599).

243420001 is a wasteful number, since it uses less digits than its factorization.

243420001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1164719.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 243420001 is about 15601.9229904522. The cubic root of 243420001 is about 624.3844614988.

Adding to 243420001 its reverse (100024342), we get a palindrome (343444343).

The spelling of 243420001 in words is "two hundred forty-three million, four hundred twenty thousand, one".