1671279 has 4 divisors (see below), whose sum is σ = 2228376. Its totient is φ = 1114184.

The previous prime is 1671277. The next prime is 1671289. The reversal of 1671279 is 9721761.

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 1671279 - 2¹ = 1671277 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1671277) 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, 278544 + ... + 278549.

It is an arithmetic number, because the mean of its divisors is an integer number (557094).

2^1671279 is an apocalyptic number.

1671279 is a deficient number, since it is larger than the sum of its proper divisors (557097).

1671279 is an equidigital number, since it uses as much as digits as its factorization.

1671279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557096.

The product of its digits is 5292, while the sum is 33.

The square root of 1671279 is about 1292.7795635761. The cubic root of 1671279 is about 118.6723799309.

The spelling of 1671279 in words is "one million, six hundred seventy-one thousand, two hundred seventy-nine".