1217515125 has 16 divisors (see below), whose sum is σ = 2025945792. Its totient is φ = 649341200.

The previous prime is 1217515109. The next prime is 1217515127. The reversal of 1217515125 is 5215157121.

It is not a de Polignac number, because 1217515125 - 2⁴ = 1217515109 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1217515092 and 1217515101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1217515127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1622979 + ... + 1623728.

It is an arithmetic number, because the mean of its divisors is an integer number (126621612).

Almost surely, 2^1217515125 is an apocalyptic number.

1217515125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1217515125 is a deficient number, since it is larger than the sum of its proper divisors (808430667).

1217515125 is an equidigital number, since it uses as much as digits as its factorization.

1217515125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3246725 (or 3246715 counting only the distinct ones).

The product of its digits is 3500, while the sum is 30.

The square root of 1217515125 is about 34892.9093799872. The cubic root of 1217515125 is about 1067.8037827393.

The spelling of 1217515125 in words is "one billion, two hundred seventeen million, five hundred fifteen thousand, one hundred twenty-five".