1662149 has 2 divisors, whose sum is σ = 1662150. Its totient is φ = 1662148.

The previous prime is 1662121. The next prime is 1662161. The reversal of 1662149 is 9412661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1050625 + 611524 = 1025^2 + 782^2 .

It is an emirp because it is prime and its reverse (9412661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1662149 - 2⁸ = 1661893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1662119) 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, 831074 + 831075.

It is an arithmetic number, because the mean of its divisors is an integer number (831075).

2^1662149 is an apocalyptic number.

It is an amenable number.

1662149 is a deficient number, since it is larger than the sum of its proper divisors (1).

1662149 is an equidigital number, since it uses as much as digits as its factorization.

1662149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 29.

The square root of 1662149 is about 1289.2435766759. The cubic root of 1662149 is about 118.4558874899.

The spelling of 1662149 in words is "one million, six hundred sixty-two thousand, one hundred forty-nine".