165397245 has 32 divisors (see below), whose sum is σ = 294196224. Its totient is φ = 78796800.

The previous prime is 165397231. The next prime is 165397247. The reversal of 165397245 is 542793561.

It is not a de Polignac number, because 165397245 - 2⁵ = 165397213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 165397197 and 165397206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165397247) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7636 + ... + 19725.

It is an arithmetic number, because the mean of its divisors is an integer number (9193632).

Almost surely, 2^165397245 is an apocalyptic number.

165397245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

165397245 is a deficient number, since it is larger than the sum of its proper divisors (128798979).

165397245 is a wasteful number, since it uses less digits than its factorization.

165397245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27413.

The product of its digits is 226800, while the sum is 42.

The square root of 165397245 is about 12860.6860236925. The cubic root of 165397245 is about 548.9204665128.

The spelling of 165397245 in words is "one hundred sixty-five million, three hundred ninety-seven thousand, two hundred forty-five".