1802149 has 2 divisors, whose sum is σ = 1802150. Its totient is φ = 1802148.

The previous prime is 1802137. The next prime is 1802189. The reversal of 1802149 is 9412081.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1737124 + 65025 = 1318^2 + 255^2 .

It is a cyclic number.

It is not a de Polignac number, because 1802149 - 2⁵ = 1802117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1802189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 901074 + 901075.

It is an arithmetic number, because the mean of its divisors is an integer number (901075).

2^1802149 is an apocalyptic number.

It is an amenable number.

1802149 is a deficient number, since it is larger than the sum of its proper divisors (1).

1802149 is an equidigital number, since it uses as much as digits as its factorization.

1802149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 1802149 is about 1342.4414326145. The cubic root of 1802149 is about 121.6924304815.

The spelling of 1802149 in words is "one million, eight hundred two thousand, one hundred forty-nine".