1200542215 has 4 divisors (see below), whose sum is σ = 1440650664. Its totient is φ = 960433768.

The previous prime is 1200542209. The next prime is 1200542221. The reversal of 1200542215 is 5122450021.

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

It is an interprime number because it is at equal distance from previous prime (1200542209) and next prime (1200542221).

It is a cyclic number.

It is not a de Polignac number, because 1200542215 - 2¹⁷ = 1200411143 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, 120054217 + ... + 120054226.

It is an arithmetic number, because the mean of its divisors is an integer number (360162666).

Almost surely, 2^1200542215 is an apocalyptic number.

1200542215 is a deficient number, since it is larger than the sum of its proper divisors (240108449).

1200542215 is an equidigital number, since it uses as much as digits as its factorization.

1200542215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240108448.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 1200542215 is about 34648.8414669235. The cubic root of 1200542215 is about 1062.8185976979.

Adding to 1200542215 its reverse (5122450021), we get a palindrome (6322992236).

The spelling of 1200542215 in words is "one billion, two hundred million, five hundred forty-two thousand, two hundred fifteen".