165091245 has 32 divisors (see below), whose sum is σ = 289111680. Its totient is φ = 79779840.

The previous prime is 165091243. The next prime is 165091249. The reversal of 165091245 is 542190561.

It is not a de Polignac number, because 165091245 - 2¹ = 165091243 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165091243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54121 + ... + 57089.

It is an arithmetic number, because the mean of its divisors is an integer number (9034740).

Almost surely, 2^165091245 is an apocalyptic number.

165091245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

165091245 is a deficient number, since it is larger than the sum of its proper divisors (124020435).

165091245 is a wasteful number, since it uses less digits than its factorization.

165091245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3325.

The product of its (nonzero) digits is 10800, while the sum is 33.

The square root of 165091245 is about 12848.7837945854. The cubic root of 165091245 is about 548.5817398797.

The spelling of 165091245 in words is "one hundred sixty-five million, ninety-one thousand, two hundred forty-five".