1001215225 has 12 divisors (see below), whose sum is σ = 1270380496. Its totient is φ = 782344080.

The previous prime is 1001215223. The next prime is 1001215253. The reversal of 1001215225 is 5225121001.

It is not a de Polignac number, because 1001215225 - 2¹ = 1001215223 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001215223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 464607 + ... + 466756.

Almost surely, 2^1001215225 is an apocalyptic number.

It is an amenable number.

1001215225 is a deficient number, since it is larger than the sum of its proper divisors (269165271).

1001215225 is an equidigital number, since it uses as much as digits as its factorization.

1001215225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 931416 (or 931411 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 1001215225 is about 31641.9851621228. The cubic root of 1001215225 is about 1000.4049110249.

Adding to 1001215225 its reverse (5225121001), we get a palindrome (6226336226).

The spelling of 1001215225 in words is "one billion, one million, two hundred fifteen thousand, two hundred twenty-five".