77275 has 12 divisors (see below), whose sum is σ = 104904. Its totient is φ = 56000.

The previous prime is 77269. The next prime is 77279. The reversal of 77275 is 57277.

It is a happy number.

It is not a de Polignac number, because 77275 - 2³ = 77267 is a prime.

It is a Duffinian number.

77275 is a lucky number.

It is a nialpdrome in base 5.

It is not an unprimeable number, because it can be changed into a prime (77279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 135 + ... + 415.

It is an arithmetic number, because the mean of its divisors is an integer number (8742).

2⁷⁷²⁷⁵ is an apocalyptic number.

77275 is a deficient number, since it is larger than the sum of its proper divisors (27629).

77275 is a wasteful number, since it uses less digits than its factorization.

77275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302 (or 297 counting only the distinct ones).

The product of its digits is 3430, while the sum is 28.

The square root of 77275 is about 277.9838124784. The cubic root of 77275 is about 42.5937951538.

The spelling of 77275 in words is "seventy-seven thousand, two hundred seventy-five".