1200025243 has 4 divisors (see below), whose sum is σ = 1200297528. Its totient is φ = 1199752960.

The previous prime is 1200025193. The next prime is 1200025271. The reversal of 1200025243 is 3425200021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3425200021 = 809 ⋅4233869.

It is a cyclic number.

It is not a de Polignac number, because 1200025243 - 2¹³ = 1200017051 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1200025243.

It is not an unprimeable number, because it can be changed into a prime (1200025273) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129421 + ... + 138382.

It is an arithmetic number, because the mean of its divisors is an integer number (300074382).

Almost surely, 2^1200025243 is an apocalyptic number.

1200025243 is a deficient number, since it is larger than the sum of its proper divisors (272285).

1200025243 is an equidigital number, since it uses as much as digits as its factorization.

1200025243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272284.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 1200025243 is about 34641.3805007826. The cubic root of 1200025243 is about 1062.6660204332. Note that the first 3 decimals are identical.

Adding to 1200025243 its reverse (3425200021), we get a palindrome (4625225264).

The spelling of 1200025243 in words is "one billion, two hundred million, twenty-five thousand, two hundred forty-three".