1201355166 has 16 divisors (see below), whose sum is σ = 2621138688. Its totient is φ = 364047000.

The previous prime is 1201355143. The next prime is 1201355171. The reversal of 1201355166 is 6615531021.

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, 9101110 + ... + 9101241.

It is an arithmetic number, because the mean of its divisors is an integer number (163821168).

Almost surely, 2^1201355166 is an apocalyptic number.

1201355166 is an abundant number, since it is smaller than the sum of its proper divisors (1419783522).

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

1201355166 is a wasteful number, since it uses less digits than its factorization.

1201355166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18202367.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 1201355166 is about 34660.5707685260. The cubic root of 1201355166 is about 1063.0584405733.

Adding to 1201355166 its reverse (6615531021), we get a palindrome (7816886187).

The spelling of 1201355166 in words is "one billion, two hundred one million, three hundred fifty-five thousand, one hundred sixty-six".