1996257 has 4 divisors (see below), whose sum is σ = 2661680. Its totient is φ = 1330836.

The previous prime is 1996237. The next prime is 1996277. The reversal of 1996257 is 7526991.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (1996237) and next prime (1996277).

It is not a de Polignac number, because 1996257 - 2⁷ = 1996129 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1996207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 332707 + ... + 332712.

It is an arithmetic number, because the mean of its divisors is an integer number (665420).

2^1996257 is an apocalyptic number.

It is an amenable number.

1996257 is a deficient number, since it is larger than the sum of its proper divisors (665423).

1996257 is an equidigital number, since it uses as much as digits as its factorization.

1996257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665422.

The product of its digits is 34020, while the sum is 39.

The square root of 1996257 is about 1412.8895922895. The cubic root of 1996257 is about 125.9134578315.

The spelling of 1996257 in words is "one million, nine hundred ninety-six thousand, two hundred fifty-seven".