1009857 has 8 divisors (see below), whose sum is σ = 1363840. Its totient is φ = 664560.

The previous prime is 1009843. The next prime is 1009859. The reversal of 1009857 is 7589001.

1009857 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 1009857 - 2⁸ = 1009601 is a prime.

It is a super-2 number, since 2×1009857² = 2039622320898, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1009859) 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, 1894 + ... + 2367.

It is an arithmetic number, because the mean of its divisors is an integer number (170480).

2^1009857 is an apocalyptic number.

It is an amenable number.

1009857 is a deficient number, since it is larger than the sum of its proper divisors (353983).

1009857 is an equidigital number, since it uses as much as digits as its factorization.

1009857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4343.

The product of its (nonzero) digits is 2520, while the sum is 30.

The square root of 1009857 is about 1004.9164144346. The cubic root of 1009857 is about 100.3274929793.

The spelling of 1009857 in words is "one million, nine thousand, eight hundred fifty-seven".