1200040355 has 4 divisors (see below), whose sum is σ = 1440048432. Its totient is φ = 960032280.

The previous prime is 1200040343. The next prime is 1200040409. The reversal of 1200040355 is 5530400021.

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

It is not a de Polignac number, because 1200040355 - 2⁶ = 1200040291 is a prime.

It is a Duffinian 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, 120004031 + ... + 120004040.

It is an arithmetic number, because the mean of its divisors is an integer number (360012108).

Almost surely, 2^1200040355 is an apocalyptic number.

1200040355 is a deficient number, since it is larger than the sum of its proper divisors (240008077).

1200040355 is an equidigital number, since it uses as much as digits as its factorization.

1200040355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240008076.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 1200040355 is about 34641.5986207334. The cubic root of 1200040355 is about 1062.6704811565.

Adding to 1200040355 its reverse (5530400021), we get a palindrome (6730440376).

The spelling of 1200040355 in words is "one billion, two hundred million, forty thousand, three hundred fifty-five".