1674021 has 4 divisors (see below), whose sum is σ = 2232032. Its totient is φ = 1116012.

The previous prime is 1674011. The next prime is 1674047. The reversal of 1674021 is 1204761.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1204761 = 3 ⋅401587.

It is not a de Polignac number, because 1674021 - 2⁹ = 1673509 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

1674021 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1674011) 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, 279001 + ... + 279006.

It is an arithmetic number, because the mean of its divisors is an integer number (558008).

2^1674021 is an apocalyptic number.

It is an amenable number.

1674021 is a deficient number, since it is larger than the sum of its proper divisors (558011).

1674021 is an equidigital number, since it uses as much as digits as its factorization.

1674021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558010.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 1674021 is about 1293.8396345761. The cubic root of 1674021 is about 118.7372447980.

Adding to 1674021 its reverse (1204761), we get a palindrome (2878782).

It can be divided in two parts, 16740 and 21, that added together give a palindrome (16761).

The spelling of 1674021 in words is "one million, six hundred seventy-four thousand, twenty-one".