1641121 has 4 divisors (see below), whose sum is σ = 1651732. Its totient is φ = 1630512.

The previous prime is 1641103. The next prime is 1641131. The reversal of 1641121 is 1211461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1211461 = 193 ⋅6277.

It can be written as a sum of positive squares in 2 ways, for example, as 1166400 + 474721 = 1080^2 + 689^2 .

It is a cyclic number.

It is not a de Polignac number, because 1641121 - 2⁵ = 1641089 is a prime.

It is a Duffinian number.

1641121 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1641095 and 1641104.

It is not an unprimeable number, because it can be changed into a prime (1641131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5070 + ... + 5383.

It is an arithmetic number, because the mean of its divisors is an integer number (412933).

2^1641121 is an apocalyptic number.

It is an amenable number.

1641121 is a deficient number, since it is larger than the sum of its proper divisors (10611).

1641121 is a wasteful number, since it uses less digits than its factorization.

1641121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10610.

The product of its digits is 48, while the sum is 16.

The square root of 1641121 is about 1281.0624496878. The cubic root of 1641121 is about 117.9542339038.

Adding to 1641121 its reverse (1211461), we get a palindrome (2852582).

The spelling of 1641121 in words is "one million, six hundred forty-one thousand, one hundred twenty-one".