4040551 has 4 divisors (see below), whose sum is σ = 4050000. Its totient is φ = 4031104.

The previous prime is 4040549. The next prime is 4040563. The reversal of 4040551 is 1550404.

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 4040551 - 2¹ = 4040549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4040501) 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, 4051 + ... + 4948.

It is an arithmetic number, because the mean of its divisors is an integer number (1012500).

Almost surely, 2^4040551 is an apocalyptic number.

4040551 is a deficient number, since it is larger than the sum of its proper divisors (9449).

4040551 is an equidigital number, since it uses as much as digits as its factorization.

4040551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9448.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 4040551 is about 2010.1121859240. The cubic root of 4040551 is about 159.2747251324.

Adding to 4040551 its reverse (1550404), we get a palindrome (5590955).

The spelling of 4040551 in words is "four million, forty thousand, five hundred fifty-one".