1225415320 has 48 divisors (see below), whose sum is σ = 2791431360. Its totient is φ = 484151616.

The previous prime is 1225415311. The next prime is 1225415357. The reversal of 1225415320 is 235145221.

It is a congruent number.

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, 273337 + ... + 277783.

It is an arithmetic number, because the mean of its divisors is an integer number (58154820).

Almost surely, 2^1225415320 is an apocalyptic number.

1225415320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1225415320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1395715680).

1225415320 is an abundant number, since it is smaller than the sum of its proper divisors (1566016040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1225415320 is an equidigital number, since it uses as much as digits as its factorization.

1225415320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4624 (or 4537 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1225415320 is about 35005.9326400540. The cubic root of 1225415320 is about 1070.1083885892.

The spelling of 1225415320 in words is "one billion, two hundred twenty-five million, four hundred fifteen thousand, three hundred twenty".