165212601 has 8 divisors (see below), whose sum is σ = 222342624. Its totient is φ = 109112160.

The previous prime is 165212591. The next prime is 165212627. The reversal of 165212601 is 106212561.

165212601 is nontrivially palindromic in base 2.

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

It is not a de Polignac number, because 165212601 - 2¹⁴ = 165196217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165212701) 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, 257020 + ... + 257661.

It is an arithmetic number, because the mean of its divisors is an integer number (27792828).

Almost surely, 2^165212601 is an apocalyptic number.

It is an amenable number.

165212601 is a deficient number, since it is larger than the sum of its proper divisors (57130023).

165212601 is a wasteful number, since it uses less digits than its factorization.

165212601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514791.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 165212601 is about 12853.5053973615. The cubic root of 165212601 is about 548.7161249181.

The spelling of 165212601 in words is "one hundred sixty-five million, two hundred twelve thousand, six hundred one".