1671442 has 4 divisors (see below), whose sum is σ = 2507166. Its totient is φ = 835720.

The previous prime is 1671437. The next prime is 1671443. The reversal of 1671442 is 2441761.

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

It can be written as a sum of positive squares in only one way, i.e., 1666681 + 4761 = 1291^2 + 69^2 .

It is not an unprimeable number, because it can be changed into a prime (1671443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 417859 + ... + 417862.

2^1671442 is an apocalyptic number.

1671442 is a deficient number, since it is larger than the sum of its proper divisors (835724).

1671442 is an equidigital number, since it uses as much as digits as its factorization.

1671442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 835723.

The product of its digits is 1344, while the sum is 25.

The square root of 1671442 is about 1292.8426044960. The cubic root of 1671442 is about 118.6762378483.

The spelling of 1671442 in words is "one million, six hundred seventy-one thousand, four hundred forty-two".