172115127 has 6 divisors (see below), whose sum is σ = 248610752. Its totient is φ = 114743412.

The previous prime is 172115117. The next prime is 172115137. The reversal of 172115127 is 721511271.

It is an interprime number because it is at equal distance from previous prime (172115117) and next prime (172115137).

It is not a de Polignac number, because 172115127 - 2⁶ = 172115063 is a prime.

It is a super-2 number, since 2×172115127² = 59247233884452258, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 172115127.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172115107) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9561943 + ... + 9561960.

Almost surely, 2^172115127 is an apocalyptic number.

172115127 is a deficient number, since it is larger than the sum of its proper divisors (76495625).

172115127 is a wasteful number, since it uses less digits than its factorization.

172115127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19123909 (or 19123906 counting only the distinct ones).

The product of its digits is 980, while the sum is 27.

The square root of 172115127 is about 13119.2654901103. The cubic root of 172115127 is about 556.2538295069.

Adding to 172115127 its reverse (721511271), we get a palindrome (893626398).

The spelling of 172115127 in words is "one hundred seventy-two million, one hundred fifteen thousand, one hundred twenty-seven".