4540431 has 8 divisors (see below), whose sum is σ = 6918784. Its totient is φ = 2594520.

The previous prime is 4540429. The next prime is 4540439. The reversal of 4540431 is 1340454.

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

It is not a de Polignac number, because 4540431 - 2¹ = 4540429 is a prime.

It is a super-2 number, since 2×4540431² = 41231027331522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 216211 = 4540431 / (4 + 5 + 4 + 0 + 4 + 3 + 1).

It is an Ulam number.

It is a Duffinian number.

4540431 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 4540398 and 4540407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4540439) 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, 108085 + ... + 108126.

It is an arithmetic number, because the mean of its divisors is an integer number (864848).

Almost surely, 2^4540431 is an apocalyptic number.

4540431 is a deficient number, since it is larger than the sum of its proper divisors (2378353).

4540431 is a wasteful number, since it uses less digits than its factorization.

4540431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216221.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 4540431 is about 2130.8287120273. The cubic root of 4540431 is about 165.5893342450.

Adding to 4540431 its reverse (1340454), we get a palindrome (5880885).

The spelling of 4540431 in words is "four million, five hundred forty thousand, four hundred thirty-one".