1217580125 has 12 divisors (see below), whose sum is σ = 1520027028. Its totient is φ = 973752000.

The previous prime is 1217580121. The next prime is 1217580209. The reversal of 1217580125 is 5210857121.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 6 ways, for example, as 1167042244 + 50537881 = 34162^2 + 7109^2 .

It is not a de Polignac number, because 1217580125 - 2² = 1217580121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1217580091 and 1217580100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1217580121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 388565 + ... + 391685.

It is an arithmetic number, because the mean of its divisors is an integer number (126668919).

Almost surely, 2^1217580125 is an apocalyptic number.

It is an amenable number.

1217580125 is a deficient number, since it is larger than the sum of its proper divisors (302446903).

1217580125 is an frugal number, since it uses more digits than its factorization.

1217580125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6257 (or 3126 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 32.

The square root of 1217580125 is about 34893.8407888842. The cubic root of 1217580125 is about 1067.8227848333.

The spelling of 1217580125 in words is "one billion, two hundred seventeen million, five hundred eighty thousand, one hundred twenty-five".