1225426433280 has 432 divisors, whose sum is σ = 4820495198400. Its totient is φ = 263620460544.

The previous prime is 1225426433239. The next prime is 1225426433291. The reversal of 1225426433280 is 823346245221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3007171 + ... + 3390269.

It is an arithmetic number, because the mean of its divisors is an integer number (11158553700).

Almost surely, 2^{1225426433280} is an apocalyptic number.

1225426433280 is a gapful number since it is divisible by the number (10) 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 1225426433280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2410247599200).

1225426433280 is an abundant number, since it is smaller than the sum of its proper divisors (3595068765120).

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

1225426433280 is a wasteful number, since it uses less digits than its factorization.

1225426433280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383154 (or 383133 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 42.

The spelling of 1225426433280 in words is "one trillion, two hundred twenty-five billion, four hundred twenty-six million, four hundred thirty-three thousand, two hundred eighty".