1225054440 has 48 divisors (see below), whose sum is σ = 3981428100. Its totient is φ = 326681088.

The previous prime is 1225054427. The next prime is 1225054463. The reversal of 1225054440 is 444505221.

1225054440 is a `hidden beast` number, since 122 + 50 + 54 + 440 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1015441956 + 209612484 = 31866^2 + 14478^2 .

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, 1701105 + ... + 1701824.

Almost surely, 2^1225054440 is an apocalyptic number.

1225054440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1225054440 is an abundant number, since it is smaller than the sum of its proper divisors (2756373660).

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

1225054440 is a wasteful number, since it uses less digits than its factorization.

1225054440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3402946 (or 3402939 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

The square root of 1225054440 is about 35000.7777056453. Note that the first 4 decimals coincide. The cubic root of 1225054440 is about 1070.0033307026.

Adding to 1225054440 its reverse (444505221), we get a palindrome (1669559661).

The spelling of 1225054440 in words is "one billion, two hundred twenty-five million, fifty-four thousand, four hundred forty".