1215225 has 36 divisors (see below), whose sum is σ = 2379312. Its totient is φ = 588000.

The previous prime is 1215209. The next prime is 1215229. The reversal of 1215225 is 5225121.

It is not a de Polignac number, because 1215225 - 2⁴ = 1215209 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1215198 and 1215207.

It is not an unprimeable number, because it can be changed into a prime (1215229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2230 + ... + 2720.

It is an arithmetic number, because the mean of its divisors is an integer number (66092).

2^1215225 is an apocalyptic number.

1215225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1215225 is a deficient number, since it is larger than the sum of its proper divisors (1164087).

1215225 is a wasteful number, since it uses less digits than its factorization.

1215225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518 (or 510 counting only the distinct ones).

The product of its digits is 200, while the sum is 18.

The square root of 1215225 is about 1102.3724416004. The cubic root of 1215225 is about 106.7133855676.

The spelling of 1215225 in words is "one million, two hundred fifteen thousand, two hundred twenty-five".