3942145 has 4 divisors (see below), whose sum is σ = 4730580. Its totient is φ = 3153712.

The previous prime is 3942137. The next prime is 3942209. The reversal of 3942145 is 5412493.

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 1871424 + 2070721 = 1368^2 + 1439^2 .

It is a cyclic number.

It is not a de Polignac number, because 3942145 - 2³ = 3942137 is a prime.

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, 394210 + ... + 394219.

It is an arithmetic number, because the mean of its divisors is an integer number (1182645).

Almost surely, 2^3942145 is an apocalyptic number.

It is an amenable number.

3942145 is a deficient number, since it is larger than the sum of its proper divisors (788435).

3942145 is an equidigital number, since it uses as much as digits as its factorization.

3942145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788434.

The product of its digits is 4320, while the sum is 28.

The square root of 3942145 is about 1985.4835683027. The cubic root of 3942145 is about 157.9710596997.

The spelling of 3942145 in words is "three million, nine hundred forty-two thousand, one hundred forty-five".