1425680521 has 2 divisors, whose sum is σ = 1425680522. Its totient is φ = 1425680520.

The previous prime is 1425680479. The next prime is 1425680527. The reversal of 1425680521 is 1250865241.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1353430521 + 72250000 = 36789^2 + 8500^2 .

It is a cyclic number.

It is not a de Polignac number, because 1425680521 - 2⁷ = 1425680393 is a prime.

It is not a weakly prime, because it can be changed into another prime (1425680527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 712840260 + 712840261.

It is an arithmetic number, because the mean of its divisors is an integer number (712840261).

Almost surely, 2^1425680521 is an apocalyptic number.

It is an amenable number.

1425680521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1425680521 is an equidigital number, since it uses as much as digits as its factorization.

1425680521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19200, while the sum is 34.

The square root of 1425680521 is about 37758.1848213073. The cubic root of 1425680521 is about 1125.4876624223.

The spelling of 1425680521 in words is "one billion, four hundred twenty-five million, six hundred eighty thousand, five hundred twenty-one".