1025857 has 8 divisors (see below), whose sum is σ = 1184832. Its totient is φ = 870000.

The previous prime is 1025839. The next prime is 1025873. The reversal of 1025857 is 7585201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1025857 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (1025807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19 + ... + 1432.

It is an arithmetic number, because the mean of its divisors is an integer number (148104).

2^1025857 is an apocalyptic number.

It is an amenable number.

1025857 is a deficient number, since it is larger than the sum of its proper divisors (158975).

1025857 is a wasteful number, since it uses less digits than its factorization.

1025857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1559.

The product of its (nonzero) digits is 2800, while the sum is 28.

The square root of 1025857 is about 1012.8459902670. The cubic root of 1025857 is about 100.8545761921.

The spelling of 1025857 in words is "one million, twenty-five thousand, eight hundred fifty-seven".