1225250440 has 32 divisors (see below), whose sum is σ = 2797966080. Its totient is φ = 482784192.

The previous prime is 1225250413. The next prime is 1225250441. The reversal of 1225250440 is 440525221.

It is not an unprimeable number, because it can be changed into a prime (1225250441) 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 7 ways as a sum of consecutive naturals, for example, 225912 + ... + 231271.

It is an arithmetic number, because the mean of its divisors is an integer number (87436440).

Almost surely, 2^1225250440 is an apocalyptic number.

1225250440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1225250440 is an abundant number, since it is smaller than the sum of its proper divisors (1572715640).

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

1225250440 is a wasteful number, since it uses less digits than its factorization.

1225250440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457261 (or 457257 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 1225250440 is about 35003.5775314467. The cubic root of 1225250440 is about 1070.0603919679.

Adding to 1225250440 its reverse (440525221), we get a palindrome (1665775661).

The spelling of 1225250440 in words is "one billion, two hundred twenty-five million, two hundred fifty thousand, four hundred forty".