1217251425 has 192 divisors, whose sum is σ = 2495840256. Its totient is φ = 517017600.

The previous prime is 1217251369. The next prime is 1217251433. The reversal of 1217251425 is 5241527121.

It is a happy number.

It is not a de Polignac number, because 1217251425 - 2⁷ = 1217251297 is a prime.

Its product of digits (5600) is a multiple of the sum of its prime factors (200).

It is a junction number, because it is equal to n+sod(n) for n = 1217251392 and 1217251401.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 11817924 + ... + 11818026.

It is an arithmetic number, because the mean of its divisors is an integer number (12999168).

Almost surely, 2^1217251425 is an apocalyptic number.

1217251425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1217251425 is an abundant number, since it is smaller than the sum of its proper divisors (1278588831).

1217251425 is a wasteful number, since it uses less digits than its factorization.

1217251425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200 (or 195 counting only the distinct ones).

The product of its digits is 5600, while the sum is 30.

The square root of 1217251425 is about 34889.1304706781. The cubic root of 1217251425 is about 1067.7266857672.

Adding to 1217251425 its reverse (5241527121), we get a palindrome (6458778546).

The spelling of 1217251425 in words is "one billion, two hundred seventeen million, two hundred fifty-one thousand, four hundred twenty-five".