171001138 has 16 divisors (see below), whose sum is σ = 319794624. Its totient is φ = 66623760.

The previous prime is 171001133. The next prime is 171001141. The reversal of 171001138 is 831100171.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (171001133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 555045 + ... + 555352.

It is an arithmetic number, because the mean of its divisors is an integer number (19987164).

Almost surely, 2^171001138 is an apocalyptic number.

171001138 is a deficient number, since it is larger than the sum of its proper divisors (148793486).

171001138 is a wasteful number, since it uses less digits than its factorization.

171001138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1110417.

The product of its (nonzero) digits is 168, while the sum is 22.

The square root of 171001138 is about 13076.7403430672. The cubic root of 171001138 is about 555.0511415687.

The spelling of 171001138 in words is "one hundred seventy-one million, one thousand, one hundred thirty-eight".