1425478139 has 2 divisors, whose sum is σ = 1425478140. Its totient is φ = 1425478138.

The previous prime is 1425478123. The next prime is 1425478213. The reversal of 1425478139 is 9318745241.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1425478139 - 2⁴ = 1425478123 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1425478139.

It is not a weakly prime, because it can be changed into another prime (1425478039) by changing a digit.

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 as a sum of consecutive naturals, namely, 712739069 + 712739070.

It is an arithmetic number, because the mean of its divisors is an integer number (712739070).

Almost surely, 2^1425478139 is an apocalyptic number.

1425478139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1425478139 is an equidigital number, since it uses as much as digits as its factorization.

1425478139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 44.

The square root of 1425478139 is about 37755.5047509631. The cubic root of 1425478139 is about 1125.4344038276.

The spelling of 1425478139 in words is "one billion, four hundred twenty-five million, four hundred seventy-eight thousand, one hundred thirty-nine".