1201540171 has 16 divisors (see below), whose sum is σ = 1369267200. Its totient is φ = 1045931040.

The previous prime is 1201540163. The next prime is 1201540177. The reversal of 1201540171 is 1710451021.

It is a cyclic number.

It is not a de Polignac number, because 1201540171 - 2³ = 1201540163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201540177) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7071 + ... + 49528.

It is an arithmetic number, because the mean of its divisors is an integer number (85579200).

Almost surely, 2^1201540171 is an apocalyptic number.

1201540171 is a deficient number, since it is larger than the sum of its proper divisors (167727029).

1201540171 is a wasteful number, since it uses less digits than its factorization.

1201540171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56706.

The product of its (nonzero) digits is 280, while the sum is 22.

The square root of 1201540171 is about 34663.2394764252. The cubic root of 1201540171 is about 1063.1130070156.

Adding to 1201540171 its reverse (1710451021), we get a palindrome (2911991192).

The spelling of 1201540171 in words is "one billion, two hundred one million, five hundred forty thousand, one hundred seventy-one".