1025128267 has 2 divisors, whose sum is σ = 1025128268. Its totient is φ = 1025128266.

The previous prime is 1025128259. The next prime is 1025128277. The reversal of 1025128267 is 7628215201.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1025128267 - 2³ = 1025128259 is a prime.

It is not a weakly prime, because it can be changed into another prime (1025128277) 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 as a sum of consecutive naturals, namely, 512564133 + 512564134.

It is an arithmetic number, because the mean of its divisors is an integer number (512564134).

Almost surely, 2^1025128267 is an apocalyptic number.

1025128267 is a deficient number, since it is larger than the sum of its proper divisors (1).

1025128267 is an equidigital number, since it uses as much as digits as its factorization.

1025128267 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 1025128267 is about 32017.6243184906. The cubic root of 1025128267 is about 1008.3068934503.

The spelling of 1025128267 in words is "one billion, twenty-five million, one hundred twenty-eight thousand, two hundred sixty-seven".