1201399205 has 4 divisors (see below), whose sum is σ = 1441679052. Its totient is φ = 961119360.

The previous prime is 1201399193. The next prime is 1201399217. The reversal of 1201399205 is 5029931021.

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 (1201399193) and next prime (1201399217).

It can be written as a sum of positive squares in 2 ways, for example, as 699549601 + 501849604 = 26449^2 + 22402^2 .

It is not a de Polignac number, because 1201399205 - 2⁴ = 1201399189 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, 120139916 + ... + 120139925.

It is an arithmetic number, because the mean of its divisors is an integer number (360419763).

Almost surely, 2^1201399205 is an apocalyptic number.

It is an amenable number.

1201399205 is a deficient number, since it is larger than the sum of its proper divisors (240279847).

1201399205 is an equidigital number, since it uses as much as digits as its factorization.

1201399205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240279846.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 1201399205 is about 34661.2060523000. The cubic root of 1201399205 is about 1063.0714301981.

The spelling of 1201399205 in words is "one billion, two hundred one million, three hundred ninety-nine thousand, two hundred five".