2053645 has 8 divisors (see below), whose sum is σ = 2688480. Its totient is φ = 1493520.

The previous prime is 2053643. The next prime is 2053661. The reversal of 2053645 is 5463502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2053645 - 2¹ = 2053643 is a prime.

It is a super-3 number, since 3×2053645³ = 25983483284943933375, which contains 333 as substring.

It is a d-powerful number, because it can be written as 2²⁰ + 0 + 5⁸ + 3¹¹ + 6⁶ + 4² + 5⁸ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2053643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18615 + ... + 18724.

It is an arithmetic number, because the mean of its divisors is an integer number (336060).

2^2053645 is an apocalyptic number.

It is an amenable number.

2053645 is a deficient number, since it is larger than the sum of its proper divisors (634835).

2053645 is a wasteful number, since it uses less digits than its factorization.

2053645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37355.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 2053645 is about 1433.0544302294. The cubic root of 2053645 is about 127.1086552307.

It can be divided in two parts, 20536 and 45, that multiplied together give a triangular number (924120 = T₁₃₅₉).

The spelling of 2053645 in words is "two million, fifty-three thousand, six hundred forty-five".