1511225 has 6 divisors (see below), whose sum is σ = 1873950. Its totient is φ = 1208960.

The previous prime is 1511207. The next prime is 1511227. The reversal of 1511225 is 5221151.

It can be written as a sum of positive squares in 3 ways, for example, as 784 + 1510441 = 28^2 + 1229^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1511225 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1511227) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 30200 + ... + 30249.

It is an arithmetic number, because the mean of its divisors is an integer number (312325).

2^1511225 is an apocalyptic number.

It is an amenable number.

1511225 is a deficient number, since it is larger than the sum of its proper divisors (362725).

1511225 is an equidigital number, since it uses as much as digits as its factorization.

1511225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60459 (or 60454 counting only the distinct ones).

The product of its digits is 100, while the sum is 17.

The square root of 1511225 is about 1229.3189171244. The cubic root of 1511225 is about 114.7562575399.

Adding to 1511225 its reverse (5221151), we get a palindrome (6732376).

The spelling of 1511225 in words is "one million, five hundred eleven thousand, two hundred twenty-five".