117206145 has 48 divisors (see below), whose sum is σ = 233206272. Its totient is φ = 53343360.

The previous prime is 117206123. The next prime is 117206149. The reversal of 117206145 is 541602711.

It is a happy number.

It is not a de Polignac number, because 117206145 - 2⁵ = 117206113 is a prime.

It is a super-2 number, since 2×117206145² = 27474560851522050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (117206149) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 84679 + ... + 86051.

It is an arithmetic number, because the mean of its divisors is an integer number (4858464).

Almost surely, 2^117206145 is an apocalyptic number.

117206145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

117206145 is a deficient number, since it is larger than the sum of its proper divisors (116000127).

117206145 is a wasteful number, since it uses less digits than its factorization.

117206145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1662 (or 1659 counting only the distinct ones).

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

The square root of 117206145 is about 10826.1786887156. The cubic root of 117206145 is about 489.3844067324.

Adding to 117206145 its reverse (541602711), we get a palindrome (658808856).

The spelling of 117206145 in words is "one hundred seventeen million, two hundred six thousand, one hundred forty-five".