1622287 has 2 divisors, whose sum is σ = 1622288. Its totient is φ = 1622286.

The previous prime is 1622273. The next prime is 1622297. The reversal of 1622287 is 7822261.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1622287 - 2¹¹ = 1620239 is a prime.

It is a super-2 number, since 2×1622287² = 5263630220738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1622207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 811143 + 811144.

It is an arithmetic number, because the mean of its divisors is an integer number (811144).

2^1622287 is an apocalyptic number.

1622287 is a deficient number, since it is larger than the sum of its proper divisors (1).

1622287 is an equidigital number, since it uses as much as digits as its factorization.

1622287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2688, while the sum is 28.

The square root of 1622287 is about 1273.6903077279. The cubic root of 1622287 is about 117.5012705461.

The spelling of 1622287 in words is "one million, six hundred twenty-two thousand, two hundred eighty-seven".