1653143 has 4 divisors (see below), whose sum is σ = 1656120. Its totient is φ = 1650168.

The previous prime is 1653109. The next prime is 1653149. The reversal of 1653143 is 3413561.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3413561 = 29 ⋅117709.

It is a cyclic number.

It is not a de Polignac number, because 1653143 - 2⁸ = 1652887 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 (1653149) 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, 380 + ... + 1857.

It is an arithmetic number, because the mean of its divisors is an integer number (414030).

2^1653143 is an apocalyptic number.

1653143 is a deficient number, since it is larger than the sum of its proper divisors (2977).

1653143 is an equidigital number, since it uses as much as digits as its factorization.

1653143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2976.

The product of its digits is 1080, while the sum is 23.

The square root of 1653143 is about 1285.7460869083. The cubic root of 1653143 is about 118.2415572641.

The spelling of 1653143 in words is "one million, six hundred fifty-three thousand, one hundred forty-three".