276145 has 4 divisors (see below), whose sum is σ = 331380. Its totient is φ = 220912.

The previous prime is 276137. The next prime is 276151. The reversal of 276145 is 541672.

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 219024 + 57121 = 468^2 + 239^2 .

It is a cyclic number.

It is not a de Polignac number, because 276145 - 2³ = 276137 is a prime.

It is a super-2 number, since 2×276145² = 152512122050, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27610 + ... + 27619.

It is an arithmetic number, because the mean of its divisors is an integer number (82845).

2²⁷⁶¹⁴⁵ is an apocalyptic number.

It is an amenable number.

276145 is a deficient number, since it is larger than the sum of its proper divisors (55235).

276145 is an equidigital number, since it uses as much as digits as its factorization.

276145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55234.

The product of its digits is 1680, while the sum is 25.

The square root of 276145 is about 525.4950047336. The cubic root of 276145 is about 65.1197005351.

The spelling of 276145 in words is "two hundred seventy-six thousand, one hundred forty-five".