1515225 has 24 divisors (see below), whose sum is σ = 2544480. Its totient is φ = 795520.

The previous prime is 1515197. The next prime is 1515229. The reversal of 1515225 is 5225151.

It is not a de Polignac number, because 1515225 - 2⁹ = 1514713 is a prime.

1515225 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1515229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6562 + ... + 6788.

It is an arithmetic number, because the mean of its divisors is an integer number (106020).

2^1515225 is an apocalyptic number.

1515225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1515225 is a deficient number, since it is larger than the sum of its proper divisors (1029255).

1515225 is a wasteful number, since it uses less digits than its factorization.

1515225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329 (or 324 counting only the distinct ones).

The product of its digits is 500, while the sum is 21.

The square root of 1515225 is about 1230.9447591180. The cubic root of 1515225 is about 114.8574162320.

The spelling of 1515225 in words is "one million, five hundred fifteen thousand, two hundred twenty-five".