1225215424 has 28 divisors (see below), whose sum is σ = 2462072800. Its totient is φ = 604850688.

The previous prime is 1225215421. The next prime is 1225215463. The reversal of 1225215424 is 4245125221.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1225215392 and 1225215401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225215421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116109 + ... + 126220.

Almost surely, 2^1225215424 is an apocalyptic number.

It is an amenable number.

1225215424 is an abundant number, since it is smaller than the sum of its proper divisors (1236857376).

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

1225215424 is an equidigital number, since it uses as much as digits as its factorization.

1225215424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242420 (or 242410 counting only the distinct ones).

The product of its digits is 6400, while the sum is 28.

The square root of 1225215424 is about 35003.0773504273. The cubic root of 1225215424 is about 1070.0501982447.

The spelling of 1225215424 in words is "one billion, two hundred twenty-five million, two hundred fifteen thousand, four hundred twenty-four".