1996541 has 4 divisors (see below), whose sum is σ = 2000412. Its totient is φ = 1992672.

The previous prime is 1996529. The next prime is 1996543. The reversal of 1996541 is 1456991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1456991 = 71 ⋅20521.

It can be written as a sum of positive squares in 2 ways, for example, as 674041 + 1322500 = 821^2 + 1150^2 .

It is a cyclic number.

It is not a de Polignac number, because 1996541 - 2¹⁰ = 1995517 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1996543) 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, 1016 + ... + 2241.

It is an arithmetic number, because the mean of its divisors is an integer number (500103).

2^1996541 is an apocalyptic number.

It is an amenable number.

1996541 is a deficient number, since it is larger than the sum of its proper divisors (3871).

1996541 is an equidigital number, since it uses as much as digits as its factorization.

1996541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3870.

The product of its digits is 9720, while the sum is 35.

The square root of 1996541 is about 1412.9900919681. The cubic root of 1996541 is about 125.9194286269.

The spelling of 1996541 in words is "one million, nine hundred ninety-six thousand, five hundred forty-one".