4951521 has 6 divisors (see below), whose sum is σ = 7152210. Its totient is φ = 3301008.

The previous prime is 4951511. The next prime is 4951549. The reversal of 4951521 is 1251594.

4951521 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 3651921 + 1299600 = 1911^2 + 1140^2 .

It is not a de Polignac number, because 4951521 - 2⁷ = 4951393 is a prime.

4951521 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4951511) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 275076 + ... + 275093.

It is an arithmetic number, because the mean of its divisors is an integer number (1192035).

Almost surely, 2^4951521 is an apocalyptic number.

It is an amenable number.

4951521 is a deficient number, since it is larger than the sum of its proper divisors (2200689).

4951521 is a wasteful number, since it uses less digits than its factorization.

4951521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550175 (or 550172 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 4951521 is about 2225.2013392051. The cubic root of 4951521 is about 170.4431460207.

It can be divided in two parts, 495 and 1521, that added together give a triangular number (2016 = T₆₃).

The spelling of 4951521 in words is "four million, nine hundred fifty-one thousand, five hundred twenty-one".