2001577 has 4 divisors (see below), whose sum is σ = 2066176. Its totient is φ = 1936980.

The previous prime is 2001553. The next prime is 2001581. The reversal of 2001577 is 7751002.

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 a cyclic number.

It is not a de Polignac number, because 2001577 - 2⁷ = 2001449 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001547) 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 3 ways as a sum of consecutive naturals, for example, 32253 + ... + 32314.

It is an arithmetic number, because the mean of its divisors is an integer number (516544).

2^2001577 is an apocalyptic number.

It is an amenable number.

2001577 is a deficient number, since it is larger than the sum of its proper divisors (64599).

2001577 is an equidigital number, since it uses as much as digits as its factorization.

2001577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64598.

The product of its (nonzero) digits is 490, while the sum is 22.

The square root of 2001577 is about 1414.7710062056. The cubic root of 2001577 is about 126.0252112145.

Adding to 2001577 its reverse (7751002), we get a palindrome (9752579).

The spelling of 2001577 in words is "two million, one thousand, five hundred seventy-seven".