77245 has 8 divisors (see below), whose sum is σ = 105984. Its totient is φ = 52944.

The previous prime is 77243. The next prime is 77249. The reversal of 77245 is 54277.

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

It is a cyclic number.

It is not a de Polignac number, because 77245 - 2¹ = 77243 is a prime.

It is a d-powerful number, because it can be written as 7² + 7³ + 2¹³ + 4⁸ + 5⁵ .

It is a Duffinian number.

77245 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77243) 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 7 ways as a sum of consecutive naturals, for example, 1069 + ... + 1138.

It is an arithmetic number, because the mean of its divisors is an integer number (13248).

2⁷⁷²⁴⁵ is an apocalyptic number.

It is an amenable number.

77245 is a deficient number, since it is larger than the sum of its proper divisors (28739).

77245 is a wasteful number, since it uses less digits than its factorization.

77245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2219.

The product of its digits is 1960, while the sum is 25.

The square root of 77245 is about 277.9298472637. The cubic root of 77245 is about 42.5882824643.

The spelling of 77245 in words is "seventy-seven thousand, two hundred forty-five".