4161021 has 4 divisors (see below), whose sum is σ = 5548032. Its totient is φ = 2774012.

The previous prime is 4161013. The next prime is 4161023. The reversal of 4161021 is 1201614.

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 4161021 - 2³ = 4161013 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4161023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 693501 + ... + 693506.

It is an arithmetic number, because the mean of its divisors is an integer number (1387008).

Almost surely, 2^4161021 is an apocalyptic number.

It is an amenable number.

4161021 is a deficient number, since it is larger than the sum of its proper divisors (1387011).

4161021 is a wasteful number, since it uses less digits than its factorization.

4161021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1387010.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 4161021 is about 2039.8580832989. The cubic root of 4161021 is about 160.8421868346.

Adding to 4161021 its reverse (1201614), we get a palindrome (5362635).

The spelling of 4161021 in words is "four million, one hundred sixty-one thousand, twenty-one".