4219381 has 4 divisors (see below), whose sum is σ = 4241664. Its totient is φ = 4197100.

The previous prime is 4219363. The next prime is 4219427. The reversal of 4219381 is 1839124.

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 4219381 - 2⁹ = 4218869 is a prime.

It is a super-2 number, since 2×4219381² = 35606352046322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4219301) 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, 10855 + ... + 11236.

It is an arithmetic number, because the mean of its divisors is an integer number (1060416).

Almost surely, 2^4219381 is an apocalyptic number.

It is an amenable number.

4219381 is a deficient number, since it is larger than the sum of its proper divisors (22283).

4219381 is a wasteful number, since it uses less digits than its factorization.

4219381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22282.

The product of its digits is 1728, while the sum is 28.

The square root of 4219381 is about 2054.1131906494. The cubic root of 4219381 is about 161.5906573406.

The spelling of 4219381 in words is "four million, two hundred nineteen thousand, three hundred eighty-one".