3945111 has 4 divisors (see below), whose sum is σ = 5260152. Its totient is φ = 2630072.

The previous prime is 3945107. The next prime is 3945119. The reversal of 3945111 is 1115493.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1115493 = 3 ⋅371831.

It is a cyclic number.

It is not a de Polignac number, because 3945111 - 2² = 3945107 is a prime.

It is a D-number.

3945111 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3945119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 657516 + ... + 657521.

It is an arithmetic number, because the mean of its divisors is an integer number (1315038).

Almost surely, 2^3945111 is an apocalyptic number.

3945111 is a deficient number, since it is larger than the sum of its proper divisors (1315041).

3945111 is a wasteful number, since it uses less digits than its factorization.

3945111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1315040.

The product of its digits is 540, while the sum is 24.

The square root of 3945111 is about 1986.2303491791. The cubic root of 3945111 is about 158.0106679760.

It can be divided in two parts, 39 and 45111, that added together give a triangular number (45150 = T₃₀₀).

The spelling of 3945111 in words is "three million, nine hundred forty-five thousand, one hundred eleven".