3949555 has 16 divisors (see below), whose sum is σ = 4967424. Its totient is φ = 3011040.

The previous prime is 3949541. The next prime is 3949579. The reversal of 3949555 is 5559493.

It is a happy number.

It is not a de Polignac number, because 3949555 - 2¹¹ = 3947507 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 12712 + ... + 13018.

It is an arithmetic number, because the mean of its divisors is an integer number (310464).

Almost surely, 2^3949555 is an apocalyptic number.

3949555 is a deficient number, since it is larger than the sum of its proper divisors (1017869).

3949555 is a wasteful number, since it uses less digits than its factorization.

3949555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426.

The product of its digits is 121500, while the sum is 40.

The square root of 3949555 is about 1987.3487363822. The cubic root of 3949555 is about 158.0699764810.

It can be divided in two parts, 39 and 49555, that added together give a palindrome (49594).

The spelling of 3949555 in words is "three million, nine hundred forty-nine thousand, five hundred fifty-five".