2045642143 has 4 divisors (see below), whose sum is σ = 2047237848. Its totient is φ = 2044046440.

The previous prime is 2045642119. The next prime is 2045642171. The reversal of 2045642143 is 3412465402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3412465402 = 2 ⋅1706232701.

It is a cyclic number.

It is not a de Polignac number, because 2045642143 - 2⁵ = 2045642111 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 (2045642243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 795928 + ... + 798493.

It is an arithmetic number, because the mean of its divisors is an integer number (511809462).

Almost surely, 2^2045642143 is an apocalyptic number.

2045642143 is a deficient number, since it is larger than the sum of its proper divisors (1595705).

2045642143 is a wasteful number, since it uses less digits than its factorization.

2045642143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1595704.

The product of its (nonzero) digits is 23040, while the sum is 31.

The square root of 2045642143 is about 45228.7756080131. The cubic root of 2045642143 is about 1269.4333022536.

The spelling of 2045642143 in words is "two billion, forty-five million, six hundred forty-two thousand, one hundred forty-three".