4028551 has 4 divisors (see below), whose sum is σ = 4240600. Its totient is φ = 3816504.

The previous prime is 4028539. The next prime is 4028561. The reversal of 4028551 is 1558204.

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 4028551 - 2²¹ = 1931399 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 (4028561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105996 + ... + 106033.

It is an arithmetic number, because the mean of its divisors is an integer number (1060150).

Almost surely, 2^4028551 is an apocalyptic number.

4028551 is a deficient number, since it is larger than the sum of its proper divisors (212049).

4028551 is a wasteful number, since it uses less digits than its factorization.

4028551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212048.

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 4028551 is about 2007.1250583857. The cubic root of 4028551 is about 159.1168925377.

The spelling of 4028551 in words is "four million, twenty-eight thousand, five hundred fifty-one".