4001587 has 8 divisors (see below), whose sum is σ = 4164800. Its totient is φ = 3844152.

The previous prime is 4001567. The next prime is 4001593. The reversal of 4001587 is 7851004.

It is not a de Polignac number, because 4001587 - 2¹⁵ = 3968819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4001527) 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 7 ways as a sum of consecutive naturals, for example, 50614 + ... + 50692.

It is an arithmetic number, because the mean of its divisors is an integer number (520600).

Almost surely, 2^4001587 is an apocalyptic number.

4001587 is a deficient number, since it is larger than the sum of its proper divisors (163213).

4001587 is an frugal number, since it uses more digits than its factorization.

4001587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190 (or 116 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 4001587 is about 2000.3967106552. The cubic root of 4001587 is about 158.7610958000.

The spelling of 4001587 in words is "four million, one thousand, five hundred eighty-seven".