1622149 has 2 divisors, whose sum is σ = 1622150. Its totient is φ = 1622148.

The previous prime is 1622143. The next prime is 1622189. The reversal of 1622149 is 9412261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1476225 + 145924 = 1215^2 + 382^2 .

It is a cyclic number.

It is not a de Polignac number, because 1622149 - 2³ = 1622141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1622141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 811074 + 811075.

It is an arithmetic number, because the mean of its divisors is an integer number (811075).

2^1622149 is an apocalyptic number.

It is an amenable number.

1622149 is a deficient number, since it is larger than the sum of its proper divisors (1).

1622149 is an equidigital number, since it uses as much as digits as its factorization.

1622149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 25.

The square root of 1622149 is about 1273.6361332814. The cubic root of 1622149 is about 117.4979386993.

It can be divided in two parts, 1622 and 149, that added together give a palindrome (1771).

The spelling of 1622149 in words is "one million, six hundred twenty-two thousand, one hundred forty-nine".