3986551 has 8 divisors (see below), whose sum is σ = 4251744. Its totient is φ = 3724800.

The previous prime is 3986539. The next prime is 3986581. The reversal of 3986551 is 1556893.

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

It is a cyclic number.

It is not a de Polignac number, because 3986551 - 2⁵ = 3986519 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3986551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3986531) 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, 1791 + ... + 3343.

It is an arithmetic number, because the mean of its divisors is an integer number (531468).

Almost surely, 2^3986551 is an apocalyptic number.

3986551 is a deficient number, since it is larger than the sum of its proper divisors (265193).

3986551 is a wasteful number, since it uses less digits than its factorization.

3986551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1721.

The product of its digits is 32400, while the sum is 37.

The square root of 3986551 is about 1996.6349190576. The cubic root of 3986551 is about 158.5619974603.

The spelling of 3986551 in words is "three million, nine hundred eighty-six thousand, five hundred fifty-one".