3951855 has 32 divisors (see below), whose sum is σ = 7139520. Its totient is φ = 2073600.

The previous prime is 3951841. The next prime is 3951863. The reversal of 3951855 is 5581593.

It is a happy number.

It is not a de Polignac number, because 3951855 - 2¹² = 3947759 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9655 + ... + 10055.

It is an arithmetic number, because the mean of its divisors is an integer number (223110).

Almost surely, 2^3951855 is an apocalyptic number.

3951855 is a deficient number, since it is larger than the sum of its proper divisors (3187665).

3951855 is a wasteful number, since it uses less digits than its factorization.

3951855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488 (or 482 counting only the distinct ones).

The product of its digits is 27000, while the sum is 36.

The square root of 3951855 is about 1987.9273125545. The cubic root of 3951855 is about 158.1006542322.

The spelling of 3951855 in words is "three million, nine hundred fifty-one thousand, eight hundred fifty-five".