1972855 has 4 divisors (see below), whose sum is σ = 2367432. Its totient is φ = 1578280.

The previous prime is 1972849. The next prime is 1972889. The reversal of 1972855 is 5582791.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5582791 = 229 ⋅24379.

It is not a de Polignac number, because 1972855 - 2³ = 1972847 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, 197281 + ... + 197290.

It is an arithmetic number, because the mean of its divisors is an integer number (591858).

2^1972855 is an apocalyptic number.

1972855 is a deficient number, since it is larger than the sum of its proper divisors (394577).

1972855 is an equidigital number, since it uses as much as digits as its factorization.

1972855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394576.

The product of its digits is 25200, while the sum is 37.

The square root of 1972855 is about 1404.5835681796. The cubic root of 1972855 is about 125.4194972681.

The spelling of 1972855 in words is "one million, nine hundred seventy-two thousand, eight hundred fifty-five".