1802491 has 2 divisors, whose sum is σ = 1802492. Its totient is φ = 1802490.

The previous prime is 1802419. The next prime is 1802503. The reversal of 1802491 is 1942081.

It is a happy number.

Together with previous prime (1802419) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is an emirp because it is prime and its reverse (1942081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1802491 - 2⁷ = 1802363 is a prime.

It is not a weakly prime, because it can be changed into another prime (1802791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 901245 + 901246.

It is an arithmetic number, because the mean of its divisors is an integer number (901246).

2^1802491 is an apocalyptic number.

1802491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1802491 is an equidigital number, since it uses as much as digits as its factorization.

1802491 is an evil number, because the sum of its binary digits is even.

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

The square root of 1802491 is about 1342.5688064304. The cubic root of 1802491 is about 121.7001279913.

The spelling of 1802491 in words is "one million, eight hundred two thousand, four hundred ninety-one".