1971055 has 4 divisors (see below), whose sum is σ = 2365272. Its totient is φ = 1576840.

The previous prime is 1971049. The next prime is 1971091. The reversal of 1971055 is 5501791.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5501791 = 73 ⋅75367.

It is not a de Polignac number, because 1971055 - 2⁵ = 1971023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 197101 + ... + 197110.

It is an arithmetic number, because the mean of its divisors is an integer number (591318).

2^1971055 is an apocalyptic number.

1971055 is a deficient number, since it is larger than the sum of its proper divisors (394217).

1971055 is an equidigital number, since it uses as much as digits as its factorization.

1971055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394216.

The product of its (nonzero) digits is 1575, while the sum is 28.

The square root of 1971055 is about 1403.9426626469. The cubic root of 1971055 is about 125.3813421092.

The spelling of 1971055 in words is "one million, nine hundred seventy-one thousand, fifty-five".