1641955 has 16 divisors (see below), whose sum is σ = 2306304. Its totient is φ = 1098720.

The previous prime is 1641953. The next prime is 1641971. The reversal of 1641955 is 5591461.

It is not a de Polignac number, because 1641955 - 2¹ = 1641953 is a prime.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (1641953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 960 + ... + 2050.

It is an arithmetic number, because the mean of its divisors is an integer number (144144).

2^1641955 is an apocalyptic number.

1641955 is a deficient number, since it is larger than the sum of its proper divisors (664349).

1641955 is a wasteful number, since it uses less digits than its factorization.

1641955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1146.

The product of its digits is 5400, while the sum is 31.

The square root of 1641955 is about 1281.3879194061. The cubic root of 1641955 is about 117.9742115434.

The spelling of 1641955 in words is "one million, six hundred forty-one thousand, nine hundred fifty-five".