3955861 has 16 divisors (see below), whose sum is σ = 5040000. Its totient is φ = 3019968.

The previous prime is 3955859. The next prime is 3955877. The reversal of 3955861 is 1685593.

It is not a de Polignac number, because 3955861 - 2¹ = 3955859 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3955861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3955561) 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, 1890 + ... + 3388.

It is an arithmetic number, because the mean of its divisors is an integer number (315000).

Almost surely, 2^3955861 is an apocalyptic number.

It is an amenable number.

3955861 is a deficient number, since it is larger than the sum of its proper divisors (1084139).

3955861 is a wasteful number, since it uses less digits than its factorization.

3955861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1548.

The product of its digits is 32400, while the sum is 37.

The square root of 3955861 is about 1988.9346394490. The cubic root of 3955861 is about 158.1540584632.

The spelling of 3955861 in words is "three million, nine hundred fifty-five thousand, eight hundred sixty-one".