165701120 has 120 divisors (see below), whose sum is σ = 431329536. Its totient is φ = 61022208.

The previous prime is 165701119. The next prime is 165701171. The reversal of 165701120 is 21107561.

It is a super-2 number, since 2×165701120² = 54913722338508800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 432449 + ... + 432831.

Almost surely, 2^165701120 is an apocalyptic number.

165701120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165701120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (215664768).

165701120 is an abundant number, since it is smaller than the sum of its proper divisors (265628416).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165701120 is an equidigital number, since it uses as much as digits as its factorization.

165701120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432 (or 403 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 23.

The square root of 165701120 is about 12872.4947077091. The cubic root of 165701120 is about 549.2564276876.

Adding to 165701120 its reverse (21107561), we get a palindrome (186808681).

The spelling of 165701120 in words is "one hundred sixty-five million, seven hundred one thousand, one hundred twenty".