1425504213509 has 2 divisors, whose sum is σ = 1425504213510. Its totient is φ = 1425504213508.

The previous prime is 1425504213487. The next prime is 1425504213569. The reversal of 1425504213509 is 9053124055241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1336116369025 + 89387844484 = 1155905^2 + 298978^2 .

It is a cyclic number.

It is not a de Polignac number, because 1425504213509 - 2⁸ = 1425504213253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1425504213569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 712752106754 + 712752106755.

It is an arithmetic number, because the mean of its divisors is an integer number (712752106755).

Almost surely, 2^{1425504213509} is an apocalyptic number.

It is an amenable number.

1425504213509 is a deficient number, since it is larger than the sum of its proper divisors (1).

1425504213509 is an equidigital number, since it uses as much as digits as its factorization.

1425504213509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216000, while the sum is 41.

The spelling of 1425504213509 in words is "one trillion, four hundred twenty-five billion, five hundred four million, two hundred thirteen thousand, five hundred nine".