8213765 has 16 divisors (see below), whose sum is σ = 11314560. Its totient is φ = 5607360.

The previous prime is 8213761. The next prime is 8213789. The reversal of 8213765 is 5673128.

It is a happy number.

It is not a de Polignac number, because 8213765 - 2² = 8213761 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8213761) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11231 + ... + 11939.

It is an arithmetic number, because the mean of its divisors is an integer number (707160).

Almost surely, 2^8213765 is an apocalyptic number.

8213765 is the 1655-th octagonal number.

It is an amenable number.

8213765 is a deficient number, since it is larger than the sum of its proper divisors (3100795).

8213765 is a wasteful number, since it uses less digits than its factorization.

8213765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1052.

The product of its digits is 10080, while the sum is 32.

The square root of 8213765 is about 2865.9666781036. The cubic root of 8213765 is about 201.7657399350.

The spelling of 8213765 in words is "eight million, two hundred thirteen thousand, seven hundred sixty-five".