1250001215 has 4 divisors (see below), whose sum is σ = 1500001464. Its totient is φ = 1000000968.

The previous prime is 1250001169. The next prime is 1250001227. The reversal of 1250001215 is 5121000521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1250001215 - 2¹⁴ = 1249984831 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1250001193 and 1250001202.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 125000117 + ... + 125000126.

It is an arithmetic number, because the mean of its divisors is an integer number (375000366).

Almost surely, 2^1250001215 is an apocalyptic number.

1250001215 is a deficient number, since it is larger than the sum of its proper divisors (250000249).

1250001215 is an equidigital number, since it uses as much as digits as its factorization.

1250001215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250000248.

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

The square root of 1250001215 is about 35355.3562420180. The cubic root of 1250001215 is about 1077.2176940342.

Adding to 1250001215 its reverse (5121000521), we get a palindrome (6371001736).

The spelling of 1250001215 in words is "one billion, two hundred fifty million, one thousand, two hundred fifteen".