4219491 has 4 divisors (see below), whose sum is σ = 5625992. Its totient is φ = 2812992.

The previous prime is 4219487. The next prime is 4219507. The reversal of 4219491 is 1949124.

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

It is not a de Polignac number, because 4219491 - 2² = 4219487 is a prime.

It is a D-number.

It is a Duffinian number.

4219491 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4219991) 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, 703246 + ... + 703251.

It is an arithmetic number, because the mean of its divisors is an integer number (1406498).

Almost surely, 2^4219491 is an apocalyptic number.

4219491 is a deficient number, since it is larger than the sum of its proper divisors (1406501).

4219491 is a wasteful number, since it uses less digits than its factorization.

4219491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1406500.

The product of its digits is 2592, while the sum is 30.

The square root of 4219491 is about 2054.1399660198. The cubic root of 4219491 is about 161.5920615607.

The spelling of 4219491 in words is "four million, two hundred nineteen thousand, four hundred ninety-one".