117147021 has 8 divisors (see below), whose sum is σ = 158527584. Its totient is φ = 76932240.

The previous prime is 117146999. The next prime is 117147049. The reversal of 117147021 is 120741711.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 117147021 - 2⁶ = 117146957 is a prime.

It is a super-3 number, since 3×117147021³ (a number of 25 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 117146982 and 117147000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117147071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 291210 + ... + 291611.

It is an arithmetic number, because the mean of its divisors is an integer number (19815948).

Almost surely, 2^117147021 is an apocalyptic number.

It is an amenable number.

117147021 is a deficient number, since it is larger than the sum of its proper divisors (41380563).

117147021 is an equidigital number, since it uses as much as digits as its factorization.

117147021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582891.

The product of its (nonzero) digits is 392, while the sum is 24.

The square root of 117147021 is about 10823.4477409003. The cubic root of 117147021 is about 489.3021037943.

Adding to 117147021 its reverse (120741711), we get a palindrome (237888732).

The spelling of 117147021 in words is "one hundred seventeen million, one hundred forty-seven thousand, twenty-one".