1525225 has 27 divisors (see below), whose sum is σ = 2161413.
Its totient is φ = 1067040.
The previous prime is 1525219. The next prime is 1525229. The reversal of 1525225 is 5225251.
The square root of 1525225 is 1235.
It is a perfect power (a square), and thus also a powerful number.
It can be written as a sum of positive squares in 4 ways, for example, as 393129 + 1132096 = 627^2 + 1064^2
It is not a de Polignac number, because 1525225 - 23 = 1525217 is a prime.
It is a super-2 number, since 2×15252252 = 4652622601250, which contains 22 as substring.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 1525196 and 1525205.
It is not an unprimeable number, because it can be changed into a prime (1525229) by changing a digit.
It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 80266 + ... + 80284.
21525225 is an apocalyptic number.
1525225 is the 1235-th square number.
1525225 is the 618-th centered octagonal number.
It is an amenable number.
1525225 is a deficient number, since it is larger than the sum of its proper divisors (636188).
1525225 is a wasteful number, since it uses less digits than its factorization.
1525225 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 74 (or 37 counting only the distinct ones).
The product of its digits is 1000, while the sum is 22.
The cubic root of 1525225 is about 115.1095364661.
The spelling of 1525225 in words is "one million, five hundred twenty-five thousand, two hundred twenty-five".