7123985 has 8 divisors (see below), whose sum is σ = 9326016. Its totient is φ = 5181040.

The previous prime is 7123981. The next prime is 7124009. The reversal of 7123985 is 5893217.

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

It is not a de Polignac number, because 7123985 - 2² = 7123981 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7123981) 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, 64709 + ... + 64818.

It is an arithmetic number, because the mean of its divisors is an integer number (1165752).

Almost surely, 2^7123985 is an apocalyptic number.

It is an amenable number.

7123985 is a deficient number, since it is larger than the sum of its proper divisors (2202031).

7123985 is a wasteful number, since it uses less digits than its factorization.

7123985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129543.

The product of its digits is 15120, while the sum is 35.

The square root of 7123985 is about 2669.0794293164. The cubic root of 7123985 is about 192.4159187530.

It can be divided in two parts, 71 and 23985, that multiplied together give a triangular number (1702935 = T₁₈₄₅).

The spelling of 7123985 in words is "seven million, one hundred twenty-three thousand, nine hundred eighty-five".