1901573 has 4 divisors (see below), whose sum is σ = 1942080. Its totient is φ = 1861068.

The previous prime is 1901567. The next prime is 1901597. The reversal of 1901573 is 3751091.

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 1901573 - 2²⁰ = 852997 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 (1901563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20183 + ... + 20276.

It is an arithmetic number, because the mean of its divisors is an integer number (485520).

2^1901573 is an apocalyptic number.

It is an amenable number.

1901573 is a deficient number, since it is larger than the sum of its proper divisors (40507).

1901573 is an equidigital number, since it uses as much as digits as its factorization.

1901573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40506.

The product of its (nonzero) digits is 945, while the sum is 26.

The square root of 1901573 is about 1378.9753442321. The cubic root of 1901573 is about 123.8904035093.

The spelling of 1901573 in words is "one million, nine hundred one thousand, five hundred seventy-three".