1305431422425 has 144 divisors (see below), whose sum is σ = 2561727216048. Its totient is φ = 631585382400.

The previous prime is 1305431422423. The next prime is 1305431422429. The reversal of 1305431422425 is 5242241345031.

It is a happy number.

1305431422425 is a `hidden beast` number, since 1 + 30 + 543 + 1 + 42 + 2 + 42 + 5 = 666.

It can be written as a sum of positive squares in 24 ways, for example, as 605259104256 + 700172318169 = 777984^2 + 836763^2 .

It is not a de Polignac number, because 1305431422425 - 2¹ = 1305431422423 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1305431422425.

It is not an unprimeable number, because it can be changed into a prime (1305431422423) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 59989647 + ... + 60011403.

Almost surely, 2^{1305431422425} is an apocalyptic number.

1305431422425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1305431422425 is a deficient number, since it is larger than the sum of its proper divisors (1256295793623).

1305431422425 is a wasteful number, since it uses less digits than its factorization.

1305431422425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22140 (or 22132 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

Adding to 1305431422425 its reverse (5242241345031), we get a palindrome (6547672767456).

The spelling of 1305431422425 in words is "one trillion, three hundred five billion, four hundred thirty-one million, four hundred twenty-two thousand, four hundred twenty-five".