4521668 has 6 divisors (see below), whose sum is σ = 7912926. Its totient is φ = 2260832.

The previous prime is 4521653. The next prime is 4521679. The reversal of 4521668 is 8661254.

It can be written as a sum of positive squares in only one way, i.e., 4293184 + 228484 = 2072^2 + 478^2 .

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565205 + ... + 565212.

It is an arithmetic number, because the mean of its divisors is an integer number (1318821).

Almost surely, 2^4521668 is an apocalyptic number.

It is an amenable number.

4521668 is a deficient number, since it is larger than the sum of its proper divisors (3391258).

4521668 is a wasteful number, since it uses less digits than its factorization.

4521668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1130421 (or 1130419 counting only the distinct ones).

The product of its digits is 11520, while the sum is 32.

The square root of 4521668 is about 2126.4214069652. The cubic root of 4521668 is about 165.3609240432.

The spelling of 4521668 in words is "four million, five hundred twenty-one thousand, six hundred sixty-eight".