1974021 has 32 divisors (see below), whose sum is σ = 3237888. Its totient is φ = 1045440.

The previous prime is 1973999. The next prime is 1974029. The reversal of 1974021 is 1204791.

It is not a de Polignac number, because 1974021 - 2⁶ = 1973957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1973982 and 1974000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1974029) 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 31 ways as a sum of consecutive naturals, for example, 29430 + ... + 29496.

It is an arithmetic number, because the mean of its divisors is an integer number (101184).

2^1974021 is an apocalyptic number.

It is an amenable number.

1974021 is a deficient number, since it is larger than the sum of its proper divisors (1263867).

1974021 is a wasteful number, since it uses less digits than its factorization.

1974021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161.

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 1974021 is about 1404.9985765117. The cubic root of 1974021 is about 125.4442009477. Note that the first 3 decimals are identical.

The spelling of 1974021 in words is "one million, nine hundred seventy-four thousand, twenty-one".