5149721 has 2 divisors, whose sum is σ = 5149722. Its totient is φ = 5149720.

The previous prime is 5149717. The next prime is 5149747. The reversal of 5149721 is 1279415.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5125696 + 24025 = 2264^2 + 155^2 .

It is a cyclic number.

It is not a de Polignac number, because 5149721 - 2² = 5149717 is a prime.

It is not a weakly prime, because it can be changed into another prime (5149021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2574860 + 2574861.

It is an arithmetic number, because the mean of its divisors is an integer number (2574861).

Almost surely, 2^5149721 is an apocalyptic number.

It is an amenable number.

5149721 is a deficient number, since it is larger than the sum of its proper divisors (1).

5149721 is an equidigital number, since it uses as much as digits as its factorization.

5149721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2520, while the sum is 29.

The square root of 5149721 is about 2269.2996717049. The cubic root of 5149721 is about 172.6876317240.

The spelling of 5149721 in words is "five million, one hundred forty-nine thousand, seven hundred twenty-one".