1821037 has 2 divisors, whose sum is σ = 1821038. Its totient is φ = 1821036.

The previous prime is 1821019. The next prime is 1821067. The reversal of 1821037 is 7301281.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1565001 + 256036 = 1251^2 + 506^2 .

It is a cyclic number.

It is not a de Polignac number, because 1821037 - 2¹¹ = 1818989 is a prime.

1821037 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1820999 and 1821017.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1821067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 910518 + 910519.

It is an arithmetic number, because the mean of its divisors is an integer number (910519).

2^1821037 is an apocalyptic number.

It is an amenable number.

1821037 is a deficient number, since it is larger than the sum of its proper divisors (1).

1821037 is an equidigital number, since it uses as much as digits as its factorization.

1821037 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1821037 is about 1349.4580393625. The cubic root of 1821037 is about 122.1160992812.

It can be divided in two parts, 182103 and 7, that multiplied together give a palindrome (1274721).

The spelling of 1821037 in words is "one million, eight hundred twenty-one thousand, thirty-seven".