1641930 has 32 divisors (see below), whose sum is σ = 3974400. Its totient is φ = 434112.

The previous prime is 1641929. The next prime is 1641931. The reversal of 1641930 is 391461.

It is an interprime number because it is at equal distance from previous prime (1641929) and next prime (1641931).

It is a self number, because there is not a number n which added to its sum of digits gives 1641930.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1641931) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6751 + ... + 6989.

It is an arithmetic number, because the mean of its divisors is an integer number (124200).

2^1641930 is an apocalyptic number.

1641930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1641930 is an abundant number, since it is smaller than the sum of its proper divisors (2332470).

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

1641930 is a wasteful number, since it uses less digits than its factorization.

1641930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 1641930 is about 1281.3781643215. The cubic root of 1641930 is about 117.9736127917.

Adding to 1641930 its product of nonzero digits (648), we get a triangular number (1642578 = T₁₈₁₂).

The spelling of 1641930 in words is "one million, six hundred forty-one thousand, nine hundred thirty".