7216123 has 8 divisors (see below), whose sum is σ = 7496496. Its totient is φ = 6940800.

The previous prime is 7216091. The next prime is 7216129. The reversal of 7216123 is 3216127.

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 7216123 - 2⁵ = 7216091 is a prime.

It is a super-2 number, since 2×7216123² = 104144862302258, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7216094 and 7216103.

It is not an unprimeable number, because it can be changed into a prime (7216129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1788 + ... + 4198.

It is an arithmetic number, because the mean of its divisors is an integer number (937062).

Almost surely, 2^7216123 is an apocalyptic number.

7216123 is a gapful number since it is divisible by the number (73) formed by its first and last digit.

7216123 is a deficient number, since it is larger than the sum of its proper divisors (280373).

7216123 is a wasteful number, since it uses less digits than its factorization.

7216123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2525.

The product of its digits is 504, while the sum is 22.

The square root of 7216123 is about 2686.2842366362. The cubic root of 7216123 is about 193.2419045168.

The spelling of 7216123 in words is "seven million, two hundred sixteen thousand, one hundred twenty-three".