165474985 has 8 divisors (see below), whose sum is σ = 213844680. Its totient is φ = 122196864.

The previous prime is 165474983. The next prime is 165474997. The reversal of 165474985 is 589474561.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 27741289 + 137733696 = 5267^2 + 11736^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 165474985 - 2¹ = 165474983 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (165474983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1272820 + ... + 1272949.

It is an arithmetic number, because the mean of its divisors is an integer number (26730585).

Almost surely, 2^165474985 is an apocalyptic number.

It is an amenable number.

165474985 is a deficient number, since it is larger than the sum of its proper divisors (48369695).

165474985 is a wasteful number, since it uses less digits than its factorization.

165474985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2545787.

The product of its digits is 1209600, while the sum is 49.

The square root of 165474985 is about 12863.7080579435. The cubic root of 165474985 is about 549.0064542270.

The spelling of 165474985 in words is "one hundred sixty-five million, four hundred seventy-four thousand, nine hundred eighty-five".