1973215 has 4 divisors (see below), whose sum is σ = 2367864. Its totient is φ = 1578568.

The previous prime is 1973203. The next prime is 1973233. The reversal of 1973215 is 5123791.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1973215 - 2⁷ = 1973087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 197317 + ... + 197326.

It is an arithmetic number, because the mean of its divisors is an integer number (591966).

2^1973215 is an apocalyptic number.

1973215 is a deficient number, since it is larger than the sum of its proper divisors (394649).

1973215 is an equidigital number, since it uses as much as digits as its factorization.

1973215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394648.

The product of its digits is 1890, while the sum is 28.

The square root of 1973215 is about 1404.7117141962. The cubic root of 1973215 is about 125.4271255147.

The spelling of 1973215 in words is "one million, nine hundred seventy-three thousand, two hundred fifteen".