4061521 has 8 divisors (see below), whose sum is σ = 4328424. Its totient is φ = 3797760.

The previous prime is 4061489. The next prime is 4061543. The reversal of 4061521 is 1251604.

It can be written as a sum of positive squares in 4 ways, for example, as 1918225 + 2143296 = 1385^2 + 1464^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4061521 - 2⁵ = 4061489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4061581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2251 + ... + 3631.

It is an arithmetic number, because the mean of its divisors is an integer number (541053).

Almost surely, 2^4061521 is an apocalyptic number.

It is an amenable number.

4061521 is a deficient number, since it is larger than the sum of its proper divisors (266903).

4061521 is a wasteful number, since it uses less digits than its factorization.

4061521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1571.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 4061521 is about 2015.3215624312. The cubic root of 4061521 is about 159.5497890639.

The spelling of 4061521 in words is "four million, sixty-one thousand, five hundred twenty-one".