276161 has 4 divisors (see below), whose sum is σ = 288192. Its totient is φ = 264132.

The previous prime is 276151. The next prime is 276173. The reversal of 276161 is 161672.

276161 is nontrivially palindromic in base 8.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-276161 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 12007 = 276161 / (2 + 7 + 6 + 1 + 6 + 1).

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

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 276161.

It is not an unprimeable number, because it can be changed into a prime (276151) 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, 5981 + ... + 6026.

It is an arithmetic number, because the mean of its divisors is an integer number (72048).

2²⁷⁶¹⁶¹ is an apocalyptic number.

It is an amenable number.

276161 is a deficient number, since it is larger than the sum of its proper divisors (12031).

276161 is a wasteful number, since it uses less digits than its factorization.

276161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12030.

The product of its digits is 504, while the sum is 23.

The square root of 276161 is about 525.5102282544. The cubic root of 276161 is about 65.1209582018.

The spelling of 276161 in words is "two hundred seventy-six thousand, one hundred sixty-one".