1425020251 has 2 divisors, whose sum is σ = 1425020252. Its totient is φ = 1425020250.

The previous prime is 1425020243. The next prime is 1425020281. The reversal of 1425020251 is 1520205241.

It is a weak prime.

It is an emirp because it is prime and its reverse (1520205241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1425020251 - 2³ = 1425020243 is a prime.

It is not a weakly prime, because it can be changed into another prime (1425020221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 712510125 + 712510126.

It is an arithmetic number, because the mean of its divisors is an integer number (712510126).

Almost surely, 2^1425020251 is an apocalyptic number.

1425020251 is a deficient number, since it is larger than the sum of its proper divisors (1).

1425020251 is an equidigital number, since it uses as much as digits as its factorization.

1425020251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 1425020251 is about 37749.4404064484. The cubic root of 1425020251 is about 1125.3138879855.

Adding to 1425020251 its reverse (1520205241), we get a palindrome (2945225492).

The spelling of 1425020251 in words is "one billion, four hundred twenty-five million, twenty thousand, two hundred fifty-one".