1425764361421 has 2 divisors, whose sum is σ = 1425764361422. Its totient is φ = 1425764361420.

The previous prime is 1425764361407. The next prime is 1425764361449. The reversal of 1425764361421 is 1241634675241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1169611968196 + 256152393225 = 1081486^2 + 506115^2 .

It is an emirp because it is prime and its reverse (1241634675241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1425764361421 - 2¹⁷ = 1425764230349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1425764361401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 712882180710 + 712882180711.

It is an arithmetic number, because the mean of its divisors is an integer number (712882180711).

Almost surely, 2^{1425764361421} is an apocalyptic number.

It is an amenable number.

1425764361421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1425764361421 is an equidigital number, since it uses as much as digits as its factorization.

1425764361421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 967680, while the sum is 46.

The spelling of 1425764361421 in words is "one trillion, four hundred twenty-five billion, seven hundred sixty-four million, three hundred sixty-one thousand, four hundred twenty-one".