162081257 has 4 divisors (see below), whose sum is σ = 174549060. Its totient is φ = 149613456.

The previous prime is 162081251. The next prime is 162081307. The reversal of 162081257 is 752180261.

162081257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 108659776 + 53421481 = 10424^2 + 7309^2 .

It is a cyclic number.

It is not a de Polignac number, because 162081257 - 2¹⁴ = 162064873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (162081251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6233882 + ... + 6233907.

It is an arithmetic number, because the mean of its divisors is an integer number (43637265).

Almost surely, 2^162081257 is an apocalyptic number.

It is an amenable number.

162081257 is a deficient number, since it is larger than the sum of its proper divisors (12467803).

162081257 is a wasteful number, since it uses less digits than its factorization.

162081257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12467802.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 162081257 is about 12731.1137376115. The cubic root of 162081257 is about 545.2273069162.

The spelling of 162081257 in words is "one hundred sixty-two million, eighty-one thousand, two hundred fifty-seven".