3555987 has 4 divisors (see below), whose sum is σ = 4741320. Its totient is φ = 2370656.

The previous prime is 3555977. The next prime is 3556001. The reversal of 3555987 is 7895553.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7895553 = 3 ⋅2631851.

It is a cyclic number.

It is not a de Polignac number, because 3555987 - 2⁷ = 3555859 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (3555947) 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, 592662 + ... + 592667.

It is an arithmetic number, because the mean of its divisors is an integer number (1185330).

Almost surely, 2^3555987 is an apocalyptic number.

3555987 is a deficient number, since it is larger than the sum of its proper divisors (1185333).

3555987 is a wasteful number, since it uses less digits than its factorization.

3555987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1185332.

The product of its digits is 189000, while the sum is 42.

The square root of 3555987 is about 1885.7324836784. The cubic root of 3555987 is about 152.6347389316.

The spelling of 3555987 in words is "three million, five hundred fifty-five thousand, nine hundred eighty-seven".