1001225 has 12 divisors (see below), whose sum is σ = 1285260. Its totient is φ = 772800.

The previous prime is 1001219. The next prime is 1001237. The reversal of 1001225 is 5221001.

1001225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 23104 + 978121 = 152^2 + 989^2 .

It is not a de Polignac number, because 1001225 - 2⁸ = 1000969 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35 + ... + 1415.

It is an arithmetic number, because the mean of its divisors is an integer number (107105).

2^1001225 is an apocalyptic number.

It is an amenable number.

1001225 is a deficient number, since it is larger than the sum of its proper divisors (284035).

1001225 is a wasteful number, since it uses less digits than its factorization.

1001225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1420 (or 1415 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 1001225 is about 1000.6123125367. The cubic root of 1001225 is about 100.0408166711.

Adding to 1001225 its reverse (5221001), we get a palindrome (6222226).

It can be divided in two parts, 100 and 1225, that multiplied together give a square (122500 = 350²).

The spelling of 1001225 in words is "one million, one thousand, two hundred twenty-five".