972215 has 4 divisors (see below), whose sum is σ = 1166664. Its totient is φ = 777768.

The previous prime is 972199. The next prime is 972221. The reversal of 972215 is 512279.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 512279 = 23 ⋅22273.

It is a cyclic number.

It is not a de Polignac number, because 972215 - 2⁴ = 972199 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, 97217 + ... + 97226.

It is an arithmetic number, because the mean of its divisors is an integer number (291666).

2⁹⁷²²¹⁵ is an apocalyptic number.

972215 is a deficient number, since it is larger than the sum of its proper divisors (194449).

972215 is a wasteful number, since it uses less digits than its factorization.

972215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194448.

The product of its digits is 1260, while the sum is 26.

The square root of 972215 is about 986.0096348414. The cubic root of 972215 is about 99.0651205741.

The spelling of 972215 in words is "nine hundred seventy-two thousand, two hundred fifteen".