4079521 has 4 divisors (see below), whose sum is σ = 4119232. Its totient is φ = 4039812.

The previous prime is 4079519. The next prime is 4079527. The reversal of 4079521 is 1259704.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4079521 - 2¹ = 4079519 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4079521.

It is not an unprimeable number, because it can be changed into a prime (4079527) 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, 19701 + ... + 19906.

It is an arithmetic number, because the mean of its divisors is an integer number (1029808).

Almost surely, 2^4079521 is an apocalyptic number.

It is an amenable number.

4079521 is a deficient number, since it is larger than the sum of its proper divisors (39711).

4079521 is a wasteful number, since it uses less digits than its factorization.

4079521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39710.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 4079521 is about 2019.7824140238. The cubic root of 4079521 is about 159.7851412900.

The spelling of 4079521 in words is "four million, seventy-nine thousand, five hundred twenty-one".