3955491 has 12 divisors (see below), whose sum is σ = 5737368. Its totient is φ = 2625984.

The previous prime is 3955459. The next prime is 3955493. The reversal of 3955491 is 1945593.

It is not a de Polignac number, because 3955491 - 2⁵ = 3955459 is a prime.

It is an Ulam number.

3955491 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3955493) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1771 + ... + 3323.

It is an arithmetic number, because the mean of its divisors is an integer number (478114).

Almost surely, 2^3955491 is an apocalyptic number.

3955491 is a deficient number, since it is larger than the sum of its proper divisors (1781877).

3955491 is a wasteful number, since it uses less digits than its factorization.

3955491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1842 (or 1839 counting only the distinct ones).

The product of its digits is 24300, while the sum is 36.

The square root of 3955491 is about 1988.8416226537. The cubic root of 3955491 is about 158.1491274822.

It can be divided in two parts, 395 and 5491, that added together give a triangular number (5886 = T₁₀₈).

The spelling of 3955491 in words is "three million, nine hundred fifty-five thousand, four hundred ninety-one".