5161645 has 4 divisors (see below), whose sum is σ = 6193980. Its totient is φ = 4129312.

The previous prime is 5161643. The next prime is 5161669. The reversal of 5161645 is 5461615.

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 2399401 + 2762244 = 1549^2 + 1662^2 .

It is a cyclic number.

It is not a de Polignac number, because 5161645 - 2¹ = 5161643 is a prime.

It is a super-3 number, since 3×5161645³ (a number of 21 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5161643) 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, 516160 + ... + 516169.

It is an arithmetic number, because the mean of its divisors is an integer number (1548495).

Almost surely, 2^5161645 is an apocalyptic number.

It is an amenable number.

5161645 is a deficient number, since it is larger than the sum of its proper divisors (1032335).

5161645 is a wasteful number, since it uses less digits than its factorization.

5161645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1032334.

The product of its digits is 3600, while the sum is 28.

The square root of 5161645 is about 2271.9253949019. The cubic root of 5161645 is about 172.8208130545.

The spelling of 5161645 in words is "five million, one hundred sixty-one thousand, six hundred forty-five".