5121605 has 4 divisors (see below), whose sum is σ = 6145932. Its totient is φ = 4097280.

The previous prime is 5121593. The next prime is 5121631. The reversal of 5121605 is 5061215.

5121605 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2211169 + 2910436 = 1487^2 + 1706^2 .

It is not a de Polignac number, because 5121605 - 2¹² = 5117509 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, 512156 + ... + 512165.

It is an arithmetic number, because the mean of its divisors is an integer number (1536483).

Almost surely, 2^5121605 is an apocalyptic number.

It is an amenable number.

5121605 is a deficient number, since it is larger than the sum of its proper divisors (1024327).

5121605 is a wasteful number, since it uses less digits than its factorization.

5121605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1024326.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 5121605 is about 2263.0963302520. The cubic root of 5121605 is about 172.3727830485.

The spelling of 5121605 in words is "five million, one hundred twenty-one thousand, six hundred five".