4561391 has 4 divisors (see below), whose sum is σ = 4572000. Its totient is φ = 4550784.

The previous prime is 4561379. The next prime is 4561393. The reversal of 4561391 is 1931654.

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

It is a cyclic number.

It is not a de Polignac number, because 4561391 - 2⁶ = 4561327 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4561393) 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, 4631 + ... + 5528.

It is an arithmetic number, because the mean of its divisors is an integer number (1143000).

Almost surely, 2^4561391 is an apocalyptic number.

4561391 is a deficient number, since it is larger than the sum of its proper divisors (10609).

4561391 is a wasteful number, since it uses less digits than its factorization.

4561391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10608.

The product of its digits is 3240, while the sum is 29.

The square root of 4561391 is about 2135.7413232880. The cubic root of 4561391 is about 165.8437466140.

The spelling of 4561391 in words is "four million, five hundred sixty-one thousand, three hundred ninety-one".