1642626 has 32 divisors (see below), whose sum is σ = 3844800. Its totient is φ = 518400.

The previous prime is 1642601. The next prime is 1642631. The reversal of 1642626 is 6262461.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a plaindrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 1642626.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 226 + ... + 1826.

It is an arithmetic number, because the mean of its divisors is an integer number (120150).

2^1642626 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1642626, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1922400).

1642626 is an abundant number, since it is smaller than the sum of its proper divisors (2202174).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1642626 is a wasteful number, since it uses less digits than its factorization.

1642626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1631 (or 1625 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 1642626 is about 1281.6497181367. The cubic root of 1642626 is about 117.9902797700.

The spelling of 1642626 in words is "one million, six hundred forty-two thousand, six hundred twenty-six".