243787245 has 32 divisors (see below), whose sum is σ = 422792832. Its totient is φ = 119238912.

The previous prime is 243787241. The next prime is 243787277. The reversal of 243787245 is 542787342.

It is a happy number.

It is not a de Polignac number, because 243787245 - 2² = 243787241 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 243787197 and 243787206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243787241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26634 + ... + 34596.

It is an arithmetic number, because the mean of its divisors is an integer number (13212276).

Almost surely, 2^243787245 is an apocalyptic number.

It is an amenable number.

243787245 is a deficient number, since it is larger than the sum of its proper divisors (179005587).

243787245 is a wasteful number, since it uses less digits than its factorization.

243787245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8141.

The product of its digits is 376320, while the sum is 42.

The square root of 243787245 is about 15613.6877450524. The cubic root of 243787245 is about 624.6983034568.

The spelling of 243787245 in words is "two hundred forty-three million, seven hundred eighty-seven thousand, two hundred forty-five".