1845901 has 2 divisors, whose sum is σ = 1845902. Its totient is φ = 1845900.

The previous prime is 1845881. The next prime is 1845913. The reversal of 1845901 is 1095481.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1565001 + 280900 = 1251^2 + 530^2 .

It is an emirp because it is prime and its reverse (1095481) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1845901 - 2¹³ = 1837709 is a prime.

1845901 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1845901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1845931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 922950 + 922951.

It is an arithmetic number, because the mean of its divisors is an integer number (922951).

2^1845901 is an apocalyptic number.

It is an amenable number.

1845901 is a deficient number, since it is larger than the sum of its proper divisors (1).

1845901 is an equidigital number, since it uses as much as digits as its factorization.

1845901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 1845901 is about 1358.6393929222. The cubic root of 1845901 is about 122.6693700504.

The spelling of 1845901 in words is "one million, eight hundred forty-five thousand, nine hundred one".