1873021 has 2 divisors, whose sum is σ = 1873022. Its totient is φ = 1873020.

The previous prime is 1873019. The next prime is 1873031. The reversal of 1873021 is 1203781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1240996 + 632025 = 1114^2 + 795^2 .

It is a cyclic number.

It is not a de Polignac number, because 1873021 - 2¹ = 1873019 is a prime.

Together with 1873019, it forms a pair of twin primes.

1873021 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1872983 and 1873001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1873031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 936510 + 936511.

It is an arithmetic number, because the mean of its divisors is an integer number (936511).

2^1873021 is an apocalyptic number.

It is an amenable number.

1873021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1873021 is an equidigital number, since it uses as much as digits as its factorization.

1873021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 1873021 is about 1368.5835743571. The cubic root of 1873021 is about 123.2672050337.

The spelling of 1873021 in words is "one million, eight hundred seventy-three thousand, twenty-one".