3987123 has 16 divisors (see below), whose sum is σ = 6286080. Its totient is φ = 2199456.

The previous prime is 3987121. The next prime is 3987149. The reversal of 3987123 is 3217893.

It is not a de Polignac number, because 3987123 - 2¹ = 3987121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3987121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2665 + ... + 3882.

It is an arithmetic number, because the mean of its divisors is an integer number (392880).

Almost surely, 2^3987123 is an apocalyptic number.

3987123 is a deficient number, since it is larger than the sum of its proper divisors (2298957).

3987123 is a wasteful number, since it uses less digits than its factorization.

3987123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6586.

The product of its digits is 9072, while the sum is 33.

The square root of 3987123 is about 1996.7781549286. The cubic root of 3987123 is about 158.5695807175.

The spelling of 3987123 in words is "three million, nine hundred eighty-seven thousand, one hundred twenty-three".