3955945 has 8 divisors (see below), whose sum is σ = 5425344. Its totient is φ = 2712624.

The previous prime is 3955927. The next prime is 3955949. The reversal of 3955945 is 5495593.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3955945 - 2⁹ = 3955433 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3955898 and 3955907.

It is not an unprimeable number, because it can be changed into a prime (3955949) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 56479 + ... + 56548.

It is an arithmetic number, because the mean of its divisors is an integer number (678168).

Almost surely, 2^3955945 is an apocalyptic number.

3955945 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3955945 is a deficient number, since it is larger than the sum of its proper divisors (1469399).

3955945 is a wasteful number, since it uses less digits than its factorization.

3955945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113039.

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

The square root of 3955945 is about 1988.9557561696. The cubic root of 3955945 is about 158.1551778863.

It can be divided in two parts, 3955 and 945, that added together give a square (4900 = 70²).

The spelling of 3955945 in words is "three million, nine hundred fifty-five thousand, nine hundred forty-five".