1642673 has 4 divisors (see below), whose sum is σ = 1661220. Its totient is φ = 1624128.

The previous prime is 1642661. The next prime is 1642679. The reversal of 1642673 is 3762461.

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

It can be written as a sum of positive squares in 2 ways, for example, as 753424 + 889249 = 868^2 + 943^2 .

It is a cyclic number.

It is not a de Polignac number, because 1642673 - 2⁴ = 1642657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1642679) 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, 9140 + ... + 9317.

It is an arithmetic number, because the mean of its divisors is an integer number (415305).

2^1642673 is an apocalyptic number.

It is an amenable number.

1642673 is a deficient number, since it is larger than the sum of its proper divisors (18547).

1642673 is an equidigital number, since it uses as much as digits as its factorization.

1642673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18546.

The product of its digits is 6048, while the sum is 29.

The square root of 1642673 is about 1281.6680537487. The cubic root of 1642673 is about 117.9914051003.

The spelling of 1642673 in words is "one million, six hundred forty-two thousand, six hundred seventy-three".