1642271 has 4 divisors (see below), whose sum is σ = 1645752. Its totient is φ = 1638792.

The previous prime is 1642259. The next prime is 1642273. The reversal of 1642271 is 1722461.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1642271 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642273) 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, 896 + ... + 2021.

It is an arithmetic number, because the mean of its divisors is an integer number (411438).

2^1642271 is an apocalyptic number.

1642271 is a deficient number, since it is larger than the sum of its proper divisors (3481).

1642271 is an equidigital number, since it uses as much as digits as its factorization.

1642271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3480.

The product of its digits is 672, while the sum is 23.

The square root of 1642271 is about 1281.5112172744. The cubic root of 1642271 is about 117.9817792416.

The spelling of 1642271 in words is "one million, six hundred forty-two thousand, two hundred seventy-one".