1222520125 has 16 divisors (see below), whose sum is σ = 1526786352. Its totient is φ = 977323200.

The previous prime is 1222520113. The next prime is 1222520153. The reversal of 1222520125 is 5210252221.

It can be written as a sum of positive squares in 8 ways, for example, as 350026681 + 872493444 = 18709^2 + 29538^2 .

It is not a de Polignac number, because 1222520125 - 2¹³ = 1222511933 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1222520096 and 1222520105.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 244147 + ... + 249103.

It is an arithmetic number, because the mean of its divisors is an integer number (95424147).

Almost surely, 2^1222520125 is an apocalyptic number.

It is an amenable number.

1222520125 is a deficient number, since it is larger than the sum of its proper divisors (304266227).

1222520125 is an equidigital number, since it uses as much as digits as its factorization.

1222520125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6945 (or 6935 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 1222520125 is about 34964.5552667269. Note that the first 3 decimals coincide. The cubic root of 1222520125 is about 1069.2649696135.

Adding to 1222520125 its reverse (5210252221), we get a palindrome (6432772346).

The spelling of 1222520125 in words is "one billion, two hundred twenty-two million, five hundred twenty thousand, one hundred twenty-five".