1622491 has 8 divisors (see below), whose sum is σ = 1761984. Its totient is φ = 1485120.

The previous prime is 1622483. The next prime is 1622549. The reversal of 1622491 is 1942261.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1622491 - 2³ = 1622483 is a prime.

It is a Duffinian number.

1622491 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1622431) 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 in 7 ways as a sum of consecutive naturals, for example, 1326 + ... + 2236.

It is an arithmetic number, because the mean of its divisors is an integer number (220248).

2^1622491 is an apocalyptic number.

1622491 is a deficient number, since it is larger than the sum of its proper divisors (139493).

1622491 is a wasteful number, since it uses less digits than its factorization.

1622491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1061.

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

The square root of 1622491 is about 1273.7703874718. The cubic root of 1622491 is about 117.5061955387.

The spelling of 1622491 in words is "one million, six hundred twenty-two thousand, four hundred ninety-one".