7124665 has 4 divisors (see below), whose sum is σ = 8549604. Its totient is φ = 5699728.

The previous prime is 7124657. The next prime is 7124669. The reversal of 7124665 is 5664217.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5664217 = 13 ⋅435709.

It can be written as a sum of positive squares in 2 ways, for example, as 4678569 + 2446096 = 2163^2 + 1564^2 .

It is a cyclic number.

It is not a de Polignac number, because 7124665 - 2³ = 7124657 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7124669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 712462 + ... + 712471.

It is an arithmetic number, because the mean of its divisors is an integer number (2137401).

Almost surely, 2^7124665 is an apocalyptic number.

It is an amenable number.

7124665 is a deficient number, since it is larger than the sum of its proper divisors (1424939).

7124665 is a wasteful number, since it uses less digits than its factorization.

7124665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1424938.

The product of its digits is 10080, while the sum is 31.

The square root of 7124665 is about 2669.2068110208. The cubic root of 7124665 is about 192.4220407321.

The spelling of 7124665 in words is "seven million, one hundred twenty-four thousand, six hundred sixty-five".