4052391 has 8 divisors (see below), whose sum is σ = 6175104. Its totient is φ = 2315640.

The previous prime is 4052383. The next prime is 4052401. The reversal of 4052391 is 1932504.

4052391 = T₁₈₈ + T₁₈₉ + ... + T₃₁₃.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4052391 - 2³ = 4052383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4052311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96465 + ... + 96506.

It is an arithmetic number, because the mean of its divisors is an integer number (771888).

Almost surely, 2^4052391 is an apocalyptic number.

4052391 is a deficient number, since it is larger than the sum of its proper divisors (2122713).

4052391 is a wasteful number, since it uses less digits than its factorization.

4052391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192981.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 4052391 is about 2013.0551408245. The cubic root of 4052391 is about 159.4301473131.

Adding to 4052391 its reverse (1932504), we get a palindrome (5984895).

The spelling of 4052391 in words is "four million, fifty-two thousand, three hundred ninety-one".