117212265 has 44 divisors (see below), whose sum is σ = 211512324. Its totient is φ = 62355744.

The previous prime is 117212261. The next prime is 117212269. The reversal of 117212265 is 562212711.

It is an interprime number because it is at equal distance from previous prime (117212261) and next prime (117212269).

It can be written as a sum of positive squares in 2 ways, for example, as 60466176 + 56746089 = 7776^2 + 7533^2 .

It is not a de Polignac number, because 117212265 - 2² = 117212261 is a prime.

It is a super-3 number, since 3×117212265³ (a number of 25 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (117212261) by changing a digit.

It is a polite number, since it can be written in 43 ways as a sum of consecutive naturals, for example, 295047 + ... + 295443.

Almost surely, 2^117212265 is an apocalyptic number.

117212265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

117212265 is a deficient number, since it is larger than the sum of its proper divisors (94300059).

117212265 is an frugal number, since it uses more digits than its factorization.

117212265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432 (or 405 counting only the distinct ones).

The product of its digits is 1680, while the sum is 27.

The square root of 117212265 is about 10826.4613332335. The cubic root of 117212265 is about 489.3929244326.

Adding to 117212265 its reverse (562212711), we get a palindrome (679424976).

The spelling of 117212265 in words is "one hundred seventeen million, two hundred twelve thousand, two hundred sixty-five".