3979145 has 4 divisors (see below), whose sum is σ = 4774980. Its totient is φ = 3183312.

The previous prime is 3979141. The next prime is 3979147. The reversal of 3979145 is 5419793.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5419793 = 347 ⋅15619.

It can be written as a sum of positive squares in 2 ways, for example, as 1776889 + 2202256 = 1333^2 + 1484^2 .

It is a cyclic number.

It is not a de Polignac number, because 3979145 - 2² = 3979141 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3979099 and 3979108.

It is not an unprimeable number, because it can be changed into a prime (3979141) 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 3 ways as a sum of consecutive naturals, for example, 397910 + ... + 397919.

It is an arithmetic number, because the mean of its divisors is an integer number (1193745).

Almost surely, 2^3979145 is an apocalyptic number.

It is an amenable number.

3979145 is a deficient number, since it is larger than the sum of its proper divisors (795835).

3979145 is an equidigital number, since it uses as much as digits as its factorization.

3979145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795834.

The product of its digits is 34020, while the sum is 38.

The square root of 3979145 is about 1994.7794364290. The cubic root of 3979145 is about 158.4637472774.

The spelling of 3979145 in words is "three million, nine hundred seventy-nine thousand, one hundred forty-five".