1425404521 has 4 divisors (see below), whose sum is σ = 1471385344. Its totient is φ = 1379423700.

The previous prime is 1425404501. The next prime is 1425404527. The reversal of 1425404521 is 1254045241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1425404521 - 2⁵ = 1425404489 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1425404521.

It is not an unprimeable number, because it can be changed into a prime (1425404527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22990365 + ... + 22990426.

It is an arithmetic number, because the mean of its divisors is an integer number (367846336).

Almost surely, 2^1425404521 is an apocalyptic number.

It is an amenable number.

1425404521 is a deficient number, since it is larger than the sum of its proper divisors (45980823).

1425404521 is an equidigital number, since it uses as much as digits as its factorization.

1425404521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45980822.

The product of its (nonzero) digits is 6400, while the sum is 28.

The square root of 1425404521 is about 37754.5298076933. The cubic root of 1425404521 is about 1125.4150293562.

Adding to 1425404521 its reverse (1254045241), we get a palindrome (2679449762).

The spelling of 1425404521 in words is "one billion, four hundred twenty-five million, four hundred four thousand, five hundred twenty-one".