1425430321 has 4 divisors (see below), whose sum is σ = 1629063232. Its totient is φ = 1221797412.

The previous prime is 1425430309. The next prime is 1425430343. The reversal of 1425430321 is 1230345241.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1230345241 = 947 ⋅1299203.

It is a cyclic number.

It is not a de Polignac number, because 1425430321 - 2⁹ = 1425429809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1425430351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101816445 + ... + 101816458.

It is an arithmetic number, because the mean of its divisors is an integer number (407265808).

Almost surely, 2^1425430321 is an apocalyptic number.

It is an amenable number.

1425430321 is a deficient number, since it is larger than the sum of its proper divisors (203632911).

1425430321 is an equidigital number, since it uses as much as digits as its factorization.

1425430321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203632910.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 1425430321 is about 37754.8714870015. The cubic root of 1425430321 is about 1125.4218193662.

Adding to 1425430321 its reverse (1230345241), we get a palindrome (2655775562).

The spelling of 1425430321 in words is "one billion, four hundred twenty-five million, four hundred thirty thousand, three hundred twenty-one".