1850521 has 2 divisors, whose sum is σ = 1850522. Its totient is φ = 1850520.

The previous prime is 1850509. The next prime is 1850561. The reversal of 1850521 is 1250581.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1792921 + 57600 = 1339^2 + 240^2 .

It is a cyclic number.

It is not a de Polignac number, because 1850521 - 2⁵ = 1850489 is a prime.

It is a Chen prime.

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

1850521 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1850492 and 1850501.

It is not a weakly prime, because it can be changed into another prime (1850561) 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 as a sum of consecutive naturals, namely, 925260 + 925261.

It is an arithmetic number, because the mean of its divisors is an integer number (925261).

2^1850521 is an apocalyptic number.

It is an amenable number.

1850521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1850521 is an equidigital number, since it uses as much as digits as its factorization.

1850521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 400, while the sum is 22.

The square root of 1850521 is about 1360.3385608002. The cubic root of 1850521 is about 122.7716255040.

The spelling of 1850521 in words is "one million, eight hundred fifty thousand, five hundred twenty-one".