4521947 has 4 divisors (see below), whose sum is σ = 4527576. Its totient is φ = 4516320.

The previous prime is 4521929. The next prime is 4521971. The reversal of 4521947 is 7491254.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4521947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4521977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1358 + ... + 3299.

It is an arithmetic number, because the mean of its divisors is an integer number (1131894).

Almost surely, 2^4521947 is an apocalyptic number.

4521947 is a deficient number, since it is larger than the sum of its proper divisors (5629).

4521947 is an equidigital number, since it uses as much as digits as its factorization.

4521947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5628.

The product of its digits is 10080, while the sum is 32.

The square root of 4521947 is about 2126.4870091303. The cubic root of 4521947 is about 165.3643250558.

The spelling of 4521947 in words is "four million, five hundred twenty-one thousand, nine hundred forty-seven".