1220648325 has 24 divisors (see below), whose sum is σ = 2173381728. Its totient is φ = 600934080.

The previous prime is 1220648323. The next prime is 1220648333. The reversal of 1220648325 is 5238460221.

It is not a de Polignac number, because 1220648325 - 2¹ = 1220648323 is a prime.

It is a super-3 number, since 3×1220648325³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220648321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 624999 + ... + 626948.

It is an arithmetic number, because the mean of its divisors is an integer number (90557572).

Almost surely, 2^1220648325 is an apocalyptic number.

1220648325 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1220648325 is a deficient number, since it is larger than the sum of its proper divisors (952733403).

1220648325 is a wasteful number, since it uses less digits than its factorization.

1220648325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1251973 (or 1251968 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 1220648325 is about 34937.7779058715. Note that the first 3 decimals coincide. The cubic root of 1220648325 is about 1068.7189738266.

The spelling of 1220648325 in words is "one billion, two hundred twenty million, six hundred forty-eight thousand, three hundred twenty-five".