1632643 has 4 divisors (see below), whose sum is σ = 1643200. Its totient is φ = 1622088.

The previous prime is 1632637. The next prime is 1632647. The reversal of 1632643 is 3462361.

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 1632643 - 2⁵ = 1632611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1632647) 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, 5043 + ... + 5356.

It is an arithmetic number, because the mean of its divisors is an integer number (410800).

2^1632643 is an apocalyptic number.

1632643 is a deficient number, since it is larger than the sum of its proper divisors (10557).

1632643 is a wasteful number, since it uses less digits than its factorization.

1632643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10556.

The product of its digits is 2592, while the sum is 25.

The square root of 1632643 is about 1277.7491929170. The cubic root of 1632643 is about 117.7507666853.

The spelling of 1632643 in words is "one million, six hundred thirty-two thousand, six hundred forty-three".