1220145425 has 12 divisors (see below), whose sum is σ = 1548167280. Its totient is φ = 953415120.

The previous prime is 1220145419. The next prime is 1220145463. The reversal of 1220145425 is 5245410221.

It is not a de Polignac number, because 1220145425 - 2⁶ = 1220145361 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1220145394 and 1220145403.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 566435 + ... + 568584.

It is an arithmetic number, because the mean of its divisors is an integer number (129013940).

Almost surely, 2^1220145425 is an apocalyptic number.

It is an amenable number.

1220145425 is a deficient number, since it is larger than the sum of its proper divisors (328021855).

1220145425 is a wasteful number, since it uses less digits than its factorization.

1220145425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1135072 (or 1135067 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 26.

The square root of 1220145425 is about 34930.5800839322. The cubic root of 1220145425 is about 1068.5721850019.

Adding to 1220145425 its reverse (5245410221), we get a palindrome (6465555646).

The spelling of 1220145425 in words is "one billion, two hundred twenty million, one hundred forty-five thousand, four hundred twenty-five".