5123645 has 4 divisors (see below), whose sum is σ = 6148380. Its totient is φ = 4098912.

The previous prime is 5123639. The next prime is 5123683. The reversal of 5123645 is 5463215.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5463215 = 5 ⋅1092643.

It can be written as a sum of positive squares in 2 ways, for example, as 2374681 + 2748964 = 1541^2 + 1658^2 .

It is a cyclic number.

It is not a de Polignac number, because 5123645 - 2¹² = 5119549 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 512360 + ... + 512369.

It is an arithmetic number, because the mean of its divisors is an integer number (1537095).

Almost surely, 2^5123645 is an apocalyptic number.

It is an amenable number.

5123645 is a deficient number, since it is larger than the sum of its proper divisors (1024735).

5123645 is a wasteful number, since it uses less digits than its factorization.

5123645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1024734.

The product of its digits is 3600, while the sum is 26.

The square root of 5123645 is about 2263.5469953151. The cubic root of 5123645 is about 172.3956660966.

The spelling of 5123645 in words is "five million, one hundred twenty-three thousand, six hundred forty-five".