1621494 has 48 divisors (see below), whose sum is σ = 4256928. Its totient is φ = 435456.

The previous prime is 1621489. The next prime is 1621519. The reversal of 1621494 is 4941261.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1764 + ... + 2520.

It is an arithmetic number, because the mean of its divisors is an integer number (88686).

2^1621494 is an apocalyptic number.

1621494 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1621494, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2128464).

1621494 is an abundant number, since it is smaller than the sum of its proper divisors (2635434).

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

1621494 is a wasteful number, since it uses less digits than its factorization.

1621494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 789 (or 786 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 1621494 is about 1273.3789695138. The cubic root of 1621494 is about 117.4821219215.

The spelling of 1621494 in words is "one million, six hundred twenty-one thousand, four hundred ninety-four".