1641225 has 24 divisors (see below), whose sum is σ = 2757760.
Its totient is φ = 861120.
The previous prime is 1641217. The next prime is 1641229. The reversal of 1641225 is 5221461.
Adding to 1641225 its reverse (5221461), we get a palindrome (6862686).
It is not a de Polignac number, because 1641225 - 23 = 1641217 is a prime.
It is a Curzon number.
It is not an unprimeable number, because it can be changed into a prime (1641229) by changing a digit.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5787 + ... + 6063.
21641225 is an apocalyptic number.
1641225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.
It is an amenable number.
1641225 is a deficient number, since it is larger than the sum of its proper divisors (1116535).
1641225 is a wasteful number, since it uses less digits than its factorization.
1641225 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 369 (or 364 counting only the distinct ones).
The product of its digits is 480, while the sum is 21.
The square root of 1641225 is about 1281.1030403523.
The cubic root of 1641225 is about 117.9567254896.
The spelling of 1641225 in words is "one million, six hundred forty-one thousand, two hundred twenty-five".