1955523 has 4 divisors (see below), whose sum is σ = 2607368. Its totient is φ = 1303680.

The previous prime is 1955521. The next prime is 1955531. The reversal of 1955523 is 3255591.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3255591 = 3 ⋅1085197.

It is not a de Polignac number, because 1955523 - 2¹ = 1955521 is a prime.

It is a D-number.

It is a Duffinian number.

1955523 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1955521) 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, 325918 + ... + 325923.

It is an arithmetic number, because the mean of its divisors is an integer number (651842).

2^1955523 is an apocalyptic number.

1955523 is a deficient number, since it is larger than the sum of its proper divisors (651845).

1955523 is an equidigital number, since it uses as much as digits as its factorization.

1955523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 651844.

The product of its digits is 6750, while the sum is 30.

The square root of 1955523 is about 1398.4001573226. The cubic root of 1955523 is about 125.0511364110.

The spelling of 1955523 in words is "one million, nine hundred fifty-five thousand, five hundred twenty-three".