1802261 has 2 divisors, whose sum is σ = 1802262. Its totient is φ = 1802260.

The previous prime is 1802239. The next prime is 1802267. The reversal of 1802261 is 1622081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1739761 + 62500 = 1319^2 + 250^2 .

It is an emirp because it is prime and its reverse (1622081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1802261 - 2⁶ = 1802197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1802267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 901130 + 901131.

It is an arithmetic number, because the mean of its divisors is an integer number (901131).

2^1802261 is an apocalyptic number.

It is an amenable number.

1802261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1802261 is an equidigital number, since it uses as much as digits as its factorization.

1802261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 1802261 is about 1342.4831470078. The cubic root of 1802261 is about 121.6949514106.

The spelling of 1802261 in words is "one million, eight hundred two thousand, two hundred sixty-one".