1425324521 has 4 divisors (see below), whose sum is σ = 1425619200. Its totient is φ = 1425029844.

The previous prime is 1425324517. The next prime is 1425324547. The reversal of 1425324521 is 1254235241.

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 1425324521 - 2² = 1425324517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1425320521) 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, 139961 + ... + 149798.

It is an arithmetic number, because the mean of its divisors is an integer number (356404800).

Almost surely, 2^1425324521 is an apocalyptic number.

It is an amenable number.

1425324521 is a deficient number, since it is larger than the sum of its proper divisors (294679).

1425324521 is an equidigital number, since it uses as much as digits as its factorization.

1425324521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294678.

The product of its digits is 9600, while the sum is 29.

The square root of 1425324521 is about 37753.4703173099. The cubic root of 1425324521 is about 1125.3939745409.

Adding to 1425324521 its reverse (1254235241), we get a palindrome (2679559762).

The spelling of 1425324521 in words is "one billion, four hundred twenty-five million, three hundred twenty-four thousand, five hundred twenty-one".