5251643 has 4 divisors (see below), whose sum is σ = 5270880. Its totient is φ = 5232408.

The previous prime is 5251627. The next prime is 5251663. The reversal of 5251643 is 3461525.

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

It is a cyclic number.

It is not a de Polignac number, because 5251643 - 2⁴ = 5251627 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5251663) 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, 9203 + ... + 9756.

It is an arithmetic number, because the mean of its divisors is an integer number (1317720).

Almost surely, 2^5251643 is an apocalyptic number.

5251643 is a deficient number, since it is larger than the sum of its proper divisors (19237).

5251643 is a wasteful number, since it uses less digits than its factorization.

5251643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19236.

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

The square root of 5251643 is about 2291.6463514251. The cubic root of 5251643 is about 173.8194608669.

The spelling of 5251643 in words is "five million, two hundred fifty-one thousand, six hundred forty-three".