1225240444140 has 48 divisors (see below), whose sum is σ = 3503666299392. Its totient is φ = 319779065536.

The previous prime is 1225240444139. The next prime is 1225240444147. The reversal of 1225240444140 is 414440425221.

It is not an unprimeable number, because it can be changed into a prime (1225240444147) 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, 217238394 + ... + 217244033.

It is an arithmetic number, because the mean of its divisors is an integer number (72993047904).

Almost surely, 2^{1225240444140} is an apocalyptic number.

1225240444140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1225240444140 is an abundant number, since it is smaller than the sum of its proper divisors (2278425855252).

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

1225240444140 is a wasteful number, since it uses less digits than its factorization.

1225240444140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434482486 (or 434482484 counting only the distinct ones).

The product of its (nonzero) digits is 40960, while the sum is 33.

Adding to 1225240444140 its reverse (414440425221), we get a palindrome (1639680869361).

The spelling of 1225240444140 in words is "one trillion, two hundred twenty-five billion, two hundred forty million, four hundred forty-four thousand, one hundred forty".