1425233821780 has 24 divisors (see below), whose sum is σ = 2993449714920. Its totient is φ = 570006159360.

The previous prime is 1425233821747. The next prime is 1425233821783. The reversal of 1425233821780 is 871283325241.

It can be written as a sum of positive squares in 4 ways, for example, as 2490608836 + 1422743212944 = 49906^2 + 1192788^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1425233821780.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1425233821783) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5326741 + ... + 5587900.

It is an arithmetic number, because the mean of its divisors is an integer number (124727071455).

Almost surely, 2^{1425233821780} is an apocalyptic number.

1425233821780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1425233821780 is an abundant number, since it is smaller than the sum of its proper divisors (1568215893140).

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

1425233821780 is a wasteful number, since it uses less digits than its factorization.

1425233821780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10921179 (or 10921177 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 46.

The spelling of 1425233821780 in words is "one trillion, four hundred twenty-five billion, two hundred thirty-three million, eight hundred twenty-one thousand, seven hundred eighty".