3954845 has 4 divisors (see below), whose sum is σ = 4745820. Its totient is φ = 3163872.

The previous prime is 3954833. The next prime is 3954851. The reversal of 3954845 is 5484593.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2829124 + 1125721 = 1682^2 + 1061^2 .

It is a cyclic number.

It is not a de Polignac number, because 3954845 - 2¹⁸ = 3692701 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3954799 and 3954808.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 395480 + ... + 395489.

It is an arithmetic number, because the mean of its divisors is an integer number (1186455).

Almost surely, 2^3954845 is an apocalyptic number.

It is an amenable number.

3954845 is a deficient number, since it is larger than the sum of its proper divisors (790975).

3954845 is an equidigital number, since it uses as much as digits as its factorization.

3954845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790974.

The product of its digits is 86400, while the sum is 38.

The square root of 3954845 is about 1988.6792099280. The cubic root of 3954845 is about 158.1405175187.

It can be divided in two parts, 39548 and 45, that added together give a palindrome (39593).

The spelling of 3954845 in words is "three million, nine hundred fifty-four thousand, eight hundred forty-five".