4202391 has 16 divisors (see below), whose sum is σ = 5872640. Its totient is φ = 2669760.

The previous prime is 4202389. The next prime is 4202413. The reversal of 4202391 is 1932024.

It is not a de Polignac number, because 4202391 - 2¹ = 4202389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4202311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6480 + ... + 7098.

It is an arithmetic number, because the mean of its divisors is an integer number (367040).

Almost surely, 2^4202391 is an apocalyptic number.

4202391 is a deficient number, since it is larger than the sum of its proper divisors (1670249).

4202391 is a wasteful number, since it uses less digits than its factorization.

4202391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 4202391 is about 2049.9734144618. The cubic root of 4202391 is about 161.3734755237.

The spelling of 4202391 in words is "four million, two hundred two thousand, three hundred ninety-one".