5113721 has 2 divisors, whose sum is σ = 5113722. Its totient is φ = 5113720.

The previous prime is 5113709. The next prime is 5113747. The reversal of 5113721 is 1273115.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5112121 + 1600 = 2261^2 + 40^2 .

It is a cyclic number.

It is not a de Polignac number, because 5113721 - 2¹⁸ = 4851577 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 5113693 and 5113702.

It is not a weakly prime, because it can be changed into another prime (5113781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2556860 + 2556861.

It is an arithmetic number, because the mean of its divisors is an integer number (2556861).

Almost surely, 2^5113721 is an apocalyptic number.

It is an amenable number.

5113721 is a deficient number, since it is larger than the sum of its proper divisors (1).

5113721 is an equidigital number, since it uses as much as digits as its factorization.

5113721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 210, while the sum is 20.

The square root of 5113721 is about 2261.3537980599. The cubic root of 5113721 is about 172.2842896340.

Adding to 5113721 its reverse (1273115), we get a palindrome (6386836).

Subtracting from 5113721 its reverse (1273115), we obtain a triangular number (3840606 = T₂₇₇₁).

The spelling of 5113721 in words is "five million, one hundred thirteen thousand, seven hundred twenty-one".