1674721 has 16 divisors (see below), whose sum is σ = 1900800. Its totient is φ = 1467648.

The previous prime is 1674703. The next prime is 1674733. The reversal of 1674721 is 1274761.

It is a cyclic number.

It is not a de Polignac number, because 1674721 - 2⁷ = 1674593 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

Its product of digits (2352) is a multiple of the sum of its prime divisors (168).

1674721 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1674721.

It is not an unprimeable number, because it can be changed into a prime (1674821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21160 + ... + 21238.

It is an arithmetic number, because the mean of its divisors is an integer number (118800).

2^1674721 is an apocalyptic number.

It is an amenable number.

1674721 is a deficient number, since it is larger than the sum of its proper divisors (226079).

1674721 is a wasteful number, since it uses less digits than its factorization.

1674721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168.

The product of its digits is 2352, while the sum is 28.

The square root of 1674721 is about 1294.1101189621. The cubic root of 1674721 is about 118.7537926767.

The spelling of 1674721 in words is "one million, six hundred seventy-four thousand, seven hundred twenty-one".