4003955 has 16 divisors (see below), whose sum is σ = 5154624. Its totient is φ = 2977920.

The previous prime is 4003949. The next prime is 4003963. The reversal of 4003955 is 5593004.

It is not a de Polignac number, because 4003955 - 2⁴ = 4003939 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3785 + ... + 4725.

It is an arithmetic number, because the mean of its divisors is an integer number (322164).

Almost surely, 2^4003955 is an apocalyptic number.

4003955 is a deficient number, since it is larger than the sum of its proper divisors (1150669).

4003955 is a wasteful number, since it uses less digits than its factorization.

4003955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1006.

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 4003955 is about 2000.9885057141. The cubic root of 4003955 is about 158.7924060561.

Adding to 4003955 its reverse (5593004), we get a palindrome (9596959).

The spelling of 4003955 in words is "four million, three thousand, nine hundred fifty-five".