1225309248 has 112 divisors (see below), whose sum is σ = 3627120000. Its totient is φ = 405609984.

The previous prime is 1225309229. The next prime is 1225309249. The reversal of 1225309248 is 8429035221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1225309249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 255093 + ... + 259851.

It is an arithmetic number, because the mean of its divisors is an integer number (32385000).

Almost surely, 2^1225309248 is an apocalyptic number.

1225309248 is a gapful number since it is divisible by the number (18) 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 1225309248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1813560000).

1225309248 is an abundant number, since it is smaller than the sum of its proper divisors (2401810752).

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

1225309248 is a wasteful number, since it uses less digits than its factorization.

1225309248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4929 (or 4913 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 1225309248 is about 35004.4175497893. The cubic root of 1225309248 is about 1070.0775114897.

The spelling of 1225309248 in words is "one billion, two hundred twenty-five million, three hundred nine thousand, two hundred forty-eight".