4021161 has 4 divisors (see below), whose sum is σ = 5361552. Its totient is φ = 2680772.

The previous prime is 4021153. The next prime is 4021177. The reversal of 4021161 is 1611204.

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 4021161 - 2³ = 4021153 is a prime.

It is a super-3 number, since 3×4021161³ (a number of 21 digits) contains 333 as substring.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 4021161.

It is not an unprimeable number, because it can be changed into a prime (4021151) 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, 670191 + ... + 670196.

It is an arithmetic number, because the mean of its divisors is an integer number (1340388).

Almost surely, 2^4021161 is an apocalyptic number.

It is an amenable number.

4021161 is a deficient number, since it is larger than the sum of its proper divisors (1340391).

4021161 is a wasteful number, since it uses less digits than its factorization.

4021161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1340390.

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

The square root of 4021161 is about 2005.2832717599. The cubic root of 4021161 is about 159.0195379654.

Adding to 4021161 its reverse (1611204), we get a palindrome (5632365).

The spelling of 4021161 in words is "four million, twenty-one thousand, one hundred sixty-one".