4252521 has 32 divisors (see below), whose sum is σ = 7184128. Its totient is φ = 2177280.

The previous prime is 4252519. The next prime is 4252541. The reversal of 4252521 is 1252524.

It is a happy number.

It is not a de Polignac number, because 4252521 - 2¹ = 4252519 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (4252511) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9891 + ... + 10311.

It is an arithmetic number, because the mean of its divisors is an integer number (224504).

Almost surely, 2^4252521 is an apocalyptic number.

It is an amenable number.

4252521 is a deficient number, since it is larger than the sum of its proper divisors (2931607).

4252521 is a wasteful number, since it uses less digits than its factorization.

4252521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481.

The product of its digits is 800, while the sum is 21.

The square root of 4252521 is about 2062.1641544746. The cubic root of 4252521 is about 162.0126114248.

It can be divided in two parts, 42525 and 21, that multiplied together give a square (893025 = 945²).

The spelling of 4252521 in words is "four million, two hundred fifty-two thousand, five hundred twenty-one".