1653243 has 8 divisors (see below), whose sum is σ = 2258256. Its totient is φ = 1075200.

The previous prime is 1653227. The next prime is 1653251. The reversal of 1653243 is 3423561.

It is a happy number.

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

It is not a de Polignac number, because 1653243 - 2⁴ = 1653227 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1653293) 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, 6598 + ... + 6843.

It is an arithmetic number, because the mean of its divisors is an integer number (282282).

2^1653243 is an apocalyptic number.

1653243 is a deficient number, since it is larger than the sum of its proper divisors (605013).

1653243 is a wasteful number, since it uses less digits than its factorization.

1653243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13485.

The product of its digits is 2160, while the sum is 24.

The square root of 1653243 is about 1285.7849742472. The cubic root of 1653243 is about 118.2439413929.

It can be divided in two parts, 165 and 3243, that multiplied together give a triangular number (535095 = T₁₀₃₄).

The spelling of 1653243 in words is "one million, six hundred fifty-three thousand, two hundred forty-three".