2045671 has 4 divisors (see below), whose sum is σ = 2050200. Its totient is φ = 2041144.

The previous prime is 2045669. The next prime is 2045677. The reversal of 2045671 is 1765402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1765402 = 2 ⋅882701.

It is a cyclic number.

It is not a de Polignac number, because 2045671 - 2¹ = 2045669 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 (2045677) 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, 1501 + ... + 2518.

It is an arithmetic number, because the mean of its divisors is an integer number (512550).

2^2045671 is an apocalyptic number.

2045671 is a deficient number, since it is larger than the sum of its proper divisors (4529).

2045671 is an equidigital number, since it uses as much as digits as its factorization.

2045671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4528.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 2045671 is about 1430.2695550140. The cubic root of 2045671 is about 126.9439271343.

The spelling of 2045671 in words is "two million, forty-five thousand, six hundred seventy-one".