1641626 has 8 divisors (see below), whose sum is σ = 2814240. Its totient is φ = 703548.

The previous prime is 1641623. The next prime is 1641631. The reversal of 1641626 is 6261461.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 1641595 and 1641604.

It is not an unprimeable number, because it can be changed into a prime (1641623) 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, 58616 + ... + 58643.

It is an arithmetic number, because the mean of its divisors is an integer number (351780).

2^1641626 is an apocalyptic number.

1641626 is a deficient number, since it is larger than the sum of its proper divisors (1172614).

1641626 is a wasteful number, since it uses less digits than its factorization.

1641626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117268.

The product of its digits is 1728, while the sum is 26.

The square root of 1641626 is about 1281.2595365499. The cubic root of 1641626 is about 117.9663314841.

The spelling of 1641626 in words is "one million, six hundred forty-one thousand, six hundred twenty-six".