243652401 has 24 divisors (see below), whose sum is σ = 367355040. Its totient is φ = 159574536.

The previous prime is 243652391. The next prime is 243652411. The reversal of 243652401 is 104256342.

243652401 is a `hidden beast` number, since 2 + 4 + 3 + 652 + 4 + 0 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (243652391) and next prime (243652411).

It is not a de Polignac number, because 243652401 - 2⁵ = 243652369 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (243652411) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 663720 + ... + 664086.

It is an arithmetic number, because the mean of its divisors is an integer number (15306460).

Almost surely, 2^243652401 is an apocalyptic number.

It is an amenable number.

243652401 is a deficient number, since it is larger than the sum of its proper divisors (123702639).

243652401 is an frugal number, since it uses more digits than its factorization.

243652401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810 (or 437 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 243652401 is about 15609.3690135124. The cubic root of 243652401 is about 624.5831041651.

The spelling of 243652401 in words is "two hundred forty-three million, six hundred fifty-two thousand, four hundred one".