4213891 has 4 divisors (see below), whose sum is σ = 4596984. Its totient is φ = 3830800.

The previous prime is 4213889. The next prime is 4213897. The reversal of 4213891 is 1983124.

It is a happy number.

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 4213891 - 2¹ = 4213889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4213897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 191530 + ... + 191551.

It is an arithmetic number, because the mean of its divisors is an integer number (1149246).

Almost surely, 2^4213891 is an apocalyptic number.

4213891 is a deficient number, since it is larger than the sum of its proper divisors (383093).

4213891 is a wasteful number, since it uses less digits than its factorization.

4213891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383092.

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

The square root of 4213891 is about 2052.7764125691. The cubic root of 4213891 is about 161.5205429686.

The spelling of 4213891 in words is "four million, two hundred thirteen thousand, eight hundred ninety-one".