1995657 has 8 divisors (see below), whose sum is σ = 2686176. Its totient is φ = 1317792.

The previous prime is 1995649. The next prime is 1995661. The reversal of 1995657 is 7565991.

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

It is not a de Polignac number, because 1995657 - 2³ = 1995649 is a prime.

1995657 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1995607) 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, 2788 + ... + 3429.

It is an arithmetic number, because the mean of its divisors is an integer number (335772).

2^1995657 is an apocalyptic number.

It is an amenable number.

1995657 is a deficient number, since it is larger than the sum of its proper divisors (690519).

1995657 is a wasteful number, since it uses less digits than its factorization.

1995657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6327.

The product of its digits is 85050, while the sum is 42.

The square root of 1995657 is about 1412.6772455165. The cubic root of 1995657 is about 125.9008416128.

The spelling of 1995657 in words is "one million, nine hundred ninety-five thousand, six hundred fifty-seven".