1428138625 has 8 divisors (see below), whose sum is σ = 1782317160. Its totient is φ = 1142510800.

The previous prime is 1428138623. The next prime is 1428138631. The reversal of 1428138625 is 5268318241.

It can be written as a sum of positive squares in 4 ways, for example, as 182331009 + 1245807616 = 13503^2 + 35296^2 .

It is not a de Polignac number, because 1428138625 - 2¹ = 1428138623 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1428138623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5712430 + ... + 5712679.

It is an arithmetic number, because the mean of its divisors is an integer number (222789645).

Almost surely, 2^1428138625 is an apocalyptic number.

It is an amenable number.

1428138625 is a deficient number, since it is larger than the sum of its proper divisors (354178535).

1428138625 is an equidigital number, since it uses as much as digits as its factorization.

1428138625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11425124 (or 11425114 counting only the distinct ones).

The product of its digits is 92160, while the sum is 40.

The square root of 1428138625 is about 37790.7214141249. The cubic root of 1428138625 is about 1126.1341319978.

The spelling of 1428138625 in words is "one billion, four hundred twenty-eight million, one hundred thirty-eight thousand, six hundred twenty-five".