5409721 has 2 divisors, whose sum is σ = 5409722. Its totient is φ = 5409720.

The previous prime is 5409713. The next prime is 5409751. The reversal of 5409721 is 1279045.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5405625 + 4096 = 2325^2 + 64^2 .

It is a cyclic number.

It is not a de Polignac number, because 5409721 - 2³ = 5409713 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 5409721.

It is not a weakly prime, because it can be changed into another prime (5409751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2704860 + 2704861.

It is an arithmetic number, because the mean of its divisors is an integer number (2704861).

Almost surely, 2^5409721 is an apocalyptic number.

It is an amenable number.

5409721 is a deficient number, since it is larger than the sum of its proper divisors (1).

5409721 is an equidigital number, since it uses as much as digits as its factorization.

5409721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 5409721 is about 2325.8806934149. The cubic root of 5409721 is about 175.5462766524.

The spelling of 5409721 in words is "five million, four hundred nine thousand, seven hundred twenty-one".