1209975198 has 16 divisors (see below), whose sum is σ = 2498013696. Its totient is φ = 390314520.

The previous prime is 1209975133. The next prime is 1209975209. The reversal of 1209975198 is 8915799021.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1209975198.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3252436 + ... + 3252807.

It is an arithmetic number, because the mean of its divisors is an integer number (156125856).

Almost surely, 2^1209975198 is an apocalyptic number.

1209975198 is an abundant number, since it is smaller than the sum of its proper divisors (1288038498).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1209975198 is a wasteful number, since it uses less digits than its factorization.

1209975198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6505279.

The product of its (nonzero) digits is 408240, while the sum is 51.

The square root of 1209975198 is about 34784.6977563411. The cubic root of 1209975198 is about 1065.5949559822.

The spelling of 1209975198 in words is "one billion, two hundred nine million, nine hundred seventy-five thousand, one hundred ninety-eight".