4542391 has 8 divisors (see below), whose sum is σ = 5312384. Its totient is φ = 3802680.

The previous prime is 4542389. The next prime is 4542407. The reversal of 4542391 is 1932454.

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

It is not a de Polignac number, because 4542391 - 2¹ = 4542389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4542301) 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, 7245 + ... + 7846.

It is an arithmetic number, because the mean of its divisors is an integer number (664048).

Almost surely, 2^4542391 is an apocalyptic number.

4542391 is the 1231-st hex number.

4542391 is a deficient number, since it is larger than the sum of its proper divisors (769993).

4542391 is a wasteful number, since it uses less digits than its factorization.

4542391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15141.

The product of its digits is 4320, while the sum is 28.

The square root of 4542391 is about 2131.2885773635. The cubic root of 4542391 is about 165.6131578575.

It can be divided in two parts, 45 and 42391, that added together give a square (42436 = 206²).

The spelling of 4542391 in words is "four million, five hundred forty-two thousand, three hundred ninety-one".