1641090 has 32 divisors (see below), whose sum is σ = 4297536. Its totient is φ = 397760.

The previous prime is 1641089. The next prime is 1641091. The reversal of 1641090 is 901461.

It is an interprime number because it is at equal distance from previous prime (1641089) and next prime (1641091).

It is not an unprimeable number, because it can be changed into a prime (1641091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2157 + ... + 2816.

It is an arithmetic number, because the mean of its divisors is an integer number (134298).

2^1641090 is an apocalyptic number.

1641090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1641090 is an abundant number, since it is smaller than the sum of its proper divisors (2656446).

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

1641090 is a wasteful number, since it uses less digits than its factorization.

1641090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4994.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 1641090 is about 1281.0503502985. The cubic root of 1641090 is about 117.9534911992.

The spelling of 1641090 in words is "one million, six hundred forty-one thousand, ninety".