8712215 has 4 divisors (see below), whose sum is σ = 10454664. Its totient is φ = 6969768.

The previous prime is 8712181. The next prime is 8712227. The reversal of 8712215 is 5122178.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5122178 = 2 ⋅2561089.

It is a cyclic number.

It is not a de Polignac number, because 8712215 - 2²² = 4517911 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 871217 + ... + 871226.

It is an arithmetic number, because the mean of its divisors is an integer number (2613666).

Almost surely, 2^8712215 is an apocalyptic number.

8712215 is a deficient number, since it is larger than the sum of its proper divisors (1742449).

8712215 is a wasteful number, since it uses less digits than its factorization.

8712215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1742448.

The product of its digits is 1120, while the sum is 26.

The square root of 8712215 is about 2951.6461508792. The cubic root of 8712215 is about 205.7672222168.

It can be divided in two parts, 8712 and 215, that multiplied together give a triangular number (1873080 = T₁₉₃₅).

The spelling of 8712215 in words is "eight million, seven hundred twelve thousand, two hundred fifteen".