1201567171 has 12 divisors (see below), whose sum is σ = 1406120688. Its totient is φ = 1023740592.

The previous prime is 1201567111. The next prime is 1201567207. The reversal of 1201567171 is 1717651021.

It is a happy number.

It is not a de Polignac number, because 1201567171 - 2⁹ = 1201566659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1201567111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 65236 + ... + 81601.

It is an arithmetic number, because the mean of its divisors is an integer number (117176724).

Almost surely, 2^1201567171 is an apocalyptic number.

1201567171 is a deficient number, since it is larger than the sum of its proper divisors (204553517).

1201567171 is a wasteful number, since it uses less digits than its factorization.

1201567171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147018 (or 147011 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 31.

The square root of 1201567171 is about 34663.6289358169. The cubic root of 1201567171 is about 1063.1209700830.

The spelling of 1201567171 in words is "one billion, two hundred one million, five hundred sixty-seven thousand, one hundred seventy-one".