1021425355780 has 24 divisors (see below), whose sum is σ = 2145088954008. Its totient is φ = 408551912448.

The previous prime is 1021425355759. The next prime is 1021425355823. The reversal of 1021425355780 is 875535241201.

It can be written as a sum of positive squares in 4 ways, for example, as 116659134916 + 904766220864 = 341554^2 + 951192^2 .

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 7 ways as a sum of consecutive naturals, for example, 675309 + ... + 1580788.

It is an arithmetic number, because the mean of its divisors is an integer number (89378706417).

Almost surely, 2^{1021425355780} is an apocalyptic number.

1021425355780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021425355780 is an abundant number, since it is smaller than the sum of its proper divisors (1123663598228).

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

1021425355780 is a wasteful number, since it uses less digits than its factorization.

1021425355780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2278743 (or 2278741 counting only the distinct ones).

The product of its (nonzero) digits is 336000, while the sum is 43.

The spelling of 1021425355780 in words is "one trillion, twenty-one billion, four hundred twenty-five million, three hundred fifty-five thousand, seven hundred eighty".