4977521 has 2 divisors, whose sum is σ = 4977522. Its totient is φ = 4977520.

The previous prime is 4977517. The next prime is 4977527. The reversal of 4977521 is 1257794.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4950625 + 26896 = 2225^2 + 164^2 .

It is a cyclic number.

It is not a de Polignac number, because 4977521 - 2² = 4977517 is a prime.

It is a Chen prime.

It is a d-powerful number, because it can be written as 4⁸ + 9⁷ + 7² + 7⁶ + 5⁵ + 2¹³ + 1 .

It is not a weakly prime, because it can be changed into another prime (4977527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2488760 + 2488761.

It is an arithmetic number, because the mean of its divisors is an integer number (2488761).

Almost surely, 2^4977521 is an apocalyptic number.

It is an amenable number.

4977521 is a deficient number, since it is larger than the sum of its proper divisors (1).

4977521 is an equidigital number, since it uses as much as digits as its factorization.

4977521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17640, while the sum is 35.

The square root of 4977521 is about 2231.0358580713. The cubic root of 4977521 is about 170.7409526835.

The spelling of 4977521 in words is "four million, nine hundred seventy-seven thousand, five hundred twenty-one".