1215247625 has 16 divisors (see below), whose sum is σ = 1519819392. Its totient is φ = 970153200.

The previous prime is 1215247613. The next prime is 1215247637. The reversal of 1215247625 is 5267425121.

It is an interprime number because it is at equal distance from previous prime (1215247613) and next prime (1215247637).

It is not a de Polignac number, because 1215247625 - 2¹² = 1215243529 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50894 + ... + 70856.

It is an arithmetic number, because the mean of its divisors is an integer number (94988712).

Almost surely, 2^1215247625 is an apocalyptic number.

It is an amenable number.

1215247625 is a deficient number, since it is larger than the sum of its proper divisors (304571767).

1215247625 is an equidigital number, since it uses as much as digits as its factorization.

1215247625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20465 (or 20455 counting only the distinct ones).

The product of its digits is 33600, while the sum is 35.

The square root of 1215247625 is about 34860.4019626854. The cubic root of 1215247625 is about 1067.1404782503.

The spelling of 1215247625 in words is "one billion, two hundred fifteen million, two hundred forty-seven thousand, six hundred twenty-five".