5145649 has 4 divisors (see below), whose sum is σ = 5174260. Its totient is φ = 5117040.

The previous prime is 5145643. The next prime is 5145661. The reversal of 5145649 is 9465415.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9465415 = 5 ⋅1893083.

It can be written as a sum of positive squares in 2 ways, for example, as 651249 + 4494400 = 807^2 + 2120^2 .

It is a cyclic number.

It is not a de Polignac number, because 5145649 - 2⁷ = 5145521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5145643) 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, 14034 + ... + 14395.

It is an arithmetic number, because the mean of its divisors is an integer number (1293565).

Almost surely, 2^5145649 is an apocalyptic number.

It is an amenable number.

5145649 is a deficient number, since it is larger than the sum of its proper divisors (28611).

5145649 is a wasteful number, since it uses less digits than its factorization.

5145649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28610.

The product of its digits is 21600, while the sum is 34.

The square root of 5145649 is about 2268.4023011803. The cubic root of 5145649 is about 172.6421037262.

The spelling of 5145649 in words is "five million, one hundred forty-five thousand, six hundred forty-nine".