1622197 has 4 divisors (see below), whose sum is σ = 1626016. Its totient is φ = 1618380.

The previous prime is 1622189. The next prime is 1622207. The reversal of 1622197 is 7912261.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1622197 - 2³ = 1622189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1622297) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1179 + ... + 2152.

It is an arithmetic number, because the mean of its divisors is an integer number (406504).

2^1622197 is an apocalyptic number.

It is an amenable number.

1622197 is a deficient number, since it is larger than the sum of its proper divisors (3819).

1622197 is an equidigital number, since it uses as much as digits as its factorization.

1622197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3818.

The product of its digits is 1512, while the sum is 28.

The square root of 1622197 is about 1273.6549768285. The cubic root of 1622197 is about 117.4990976240.

Subtracting 1622197 from its reverse (7912261), we obtain a square (6290064 = 2508²).

The spelling of 1622197 in words is "one million, six hundred twenty-two thousand, one hundred ninety-seven".