1025257867 has 4 divisors (see below), whose sum is σ = 1069834320. Its totient is φ = 980681416.

The previous prime is 1025257861. The next prime is 1025257873. The reversal of 1025257867 is 7687525201.

1025257867 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1025257861) and next prime (1025257873).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1025257867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1025257861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22288192 + ... + 22288237.

It is an arithmetic number, because the mean of its divisors is an integer number (267458580).

Almost surely, 2^1025257867 is an apocalyptic number.

1025257867 is a deficient number, since it is larger than the sum of its proper divisors (44576453).

1025257867 is an equidigital number, since it uses as much as digits as its factorization.

1025257867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44576452.

The product of its (nonzero) digits is 235200, while the sum is 43.

The square root of 1025257867 is about 32019.6481398531. The cubic root of 1025257867 is about 1008.3493827891.

The spelling of 1025257867 in words is "one billion, twenty-five million, two hundred fifty-seven thousand, eight hundred sixty-seven".