4219091 has 4 divisors (see below), whose sum is σ = 4247184. Its totient is φ = 4191000.

The previous prime is 4219079. The next prime is 4219093. The reversal of 4219091 is 1909124.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4219091 - 2⁶ = 4219027 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 4219091.

It is not an unprimeable number, because it can be changed into a prime (4219093) 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, 13820 + ... + 14121.

It is an arithmetic number, because the mean of its divisors is an integer number (1061796).

Almost surely, 2^4219091 is an apocalyptic number.

4219091 is a deficient number, since it is larger than the sum of its proper divisors (28093).

4219091 is a wasteful number, since it uses less digits than its factorization.

4219091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28092.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 4219091 is about 2054.0425993635. The cubic root of 4219091 is about 161.5869551890.

The spelling of 4219091 in words is "four million, two hundred nineteen thousand, ninety-one".