4247945 has 8 divisors (see below), whose sum is σ = 5489736. Its totient is φ = 3136896.

The previous prime is 4247923. The next prime is 4247981. The reversal of 4247945 is 5497424.

It can be written as a sum of positive squares in 4 ways, for example, as 499849 + 3748096 = 707^2 + 1936^2 .

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 4247945 - 2⁸ = 4247689 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32612 + ... + 32741.

It is an arithmetic number, because the mean of its divisors is an integer number (686217).

Almost surely, 2^4247945 is an apocalyptic number.

It is an amenable number.

4247945 is a deficient number, since it is larger than the sum of its proper divisors (1241791).

4247945 is a wasteful number, since it uses less digits than its factorization.

4247945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65371.

The product of its digits is 40320, while the sum is 35.

The square root of 4247945 is about 2061.0543418358. The cubic root of 4247945 is about 161.9544783950.

It can be divided in two parts, 42479 and 45, that added together give a palindrome (42524).

The spelling of 4247945 in words is "four million, two hundred forty-seven thousand, nine hundred forty-five".