45142165 has 4 divisors (see below), whose sum is σ = 54170604. Its totient is φ = 36113728.

The previous prime is 45142147. The next prime is 45142171. The reversal of 45142165 is 56124154.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56124154 = 2 ⋅28062077.

It can be written as a sum of positive squares in 2 ways, for example, as 20629764 + 24512401 = 4542^2 + 4951^2 .

It is a cyclic number.

It is not a de Polignac number, because 45142165 - 2⁵ = 45142133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4514212 + ... + 4514221.

It is an arithmetic number, because the mean of its divisors is an integer number (13542651).

Almost surely, 2^45142165 is an apocalyptic number.

It is an amenable number.

45142165 is a deficient number, since it is larger than the sum of its proper divisors (9028439).

45142165 is an equidigital number, since it uses as much as digits as its factorization.

45142165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9028438.

The product of its digits is 4800, while the sum is 28.

The square root of 45142165 is about 6718.7919301017. The cubic root of 45142165 is about 356.0635039052.

The spelling of 45142165 in words is "forty-five million, one hundred forty-two thousand, one hundred sixty-five".