1353643 has 4 divisors (see below), whose sum is σ = 1359288. Its totient is φ = 1348000.

The previous prime is 1353641. The next prime is 1353679. The reversal of 1353643 is 3463531.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1353643 - 2¹ = 1353641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1353641) 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, 2446 + ... + 2947.

It is an arithmetic number, because the mean of its divisors is an integer number (339822).

2^1353643 is an apocalyptic number.

1353643 is a deficient number, since it is larger than the sum of its proper divisors (5645).

1353643 is an equidigital number, since it uses as much as digits as its factorization.

1353643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5644.

The product of its digits is 3240, while the sum is 25.

The square root of 1353643 is about 1163.4616452638. The cubic root of 1353643 is about 110.6202699415.

The spelling of 1353643 in words is "one million, three hundred fifty-three thousand, six hundred forty-three".