1425520405 has 4 divisors (see below), whose sum is σ = 1710624492. Its totient is φ = 1140416320.

The previous prime is 1425520367. The next prime is 1425520441. The reversal of 1425520405 is 5040255241.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 143952004 + 1281568401 = 11998^2 + 35799^2 .

It is not a de Polignac number, because 1425520405 - 2²⁹ = 888649493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 142552036 + ... + 142552045.

It is an arithmetic number, because the mean of its divisors is an integer number (427656123).

Almost surely, 2^1425520405 is an apocalyptic number.

It is an amenable number.

1425520405 is a deficient number, since it is larger than the sum of its proper divisors (285104087).

1425520405 is an equidigital number, since it uses as much as digits as its factorization.

1425520405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285104086.

The product of its (nonzero) digits is 8000, while the sum is 28.

The square root of 1425520405 is about 37756.0644797627. The cubic root of 1425520405 is about 1125.4455269119.

Adding to 1425520405 its reverse (5040255241), we get a palindrome (6465775646).

The spelling of 1425520405 in words is "one billion, four hundred twenty-five million, five hundred twenty thousand, four hundred five".