3992605 has 4 divisors (see below), whose sum is σ = 4791132. Its totient is φ = 3194080.

The previous prime is 3992587. The next prime is 3992609. The reversal of 3992605 is 5062993.

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: 5062993 = 13 ⋅389461.

It can be written as a sum of positive squares in 2 ways, for example, as 799236 + 3193369 = 894^2 + 1787^2 .

It is not a de Polignac number, because 3992605 - 2⁷ = 3992477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3992609) 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, 399256 + ... + 399265.

It is an arithmetic number, because the mean of its divisors is an integer number (1197783).

Almost surely, 2^3992605 is an apocalyptic number.

It is an amenable number.

3992605 is a deficient number, since it is larger than the sum of its proper divisors (798527).

3992605 is an equidigital number, since it uses as much as digits as its factorization.

3992605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798526.

The product of its (nonzero) digits is 14580, while the sum is 34.

The square root of 3992605 is about 1998.1503947401. The cubic root of 3992605 is about 158.6422212612.

The spelling of 3992605 in words is "three million, nine hundred ninety-two thousand, six hundred five".