6249409 has 2 divisors, whose sum is σ = 6249410. Its totient is φ = 6249408.

The previous prime is 6249407. The next prime is 6249433. The reversal of 6249409 is 9049426.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6235009 + 14400 = 2497^2 + 120^2 .

It is a cyclic number.

It is not a de Polignac number, because 6249409 - 2¹ = 6249407 is a prime.

It is a super-2 number, since 2×6249409² = 78110225698562, which contains 22 as substring.

Together with 6249407, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (6249403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3124704 + 3124705.

It is an arithmetic number, because the mean of its divisors is an integer number (3124705).

Almost surely, 2^6249409 is an apocalyptic number.

It is an amenable number.

6249409 is a deficient number, since it is larger than the sum of its proper divisors (1).

6249409 is an equidigital number, since it uses as much as digits as its factorization.

6249409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 6249409 is about 2499.8817972056. The cubic root of 6249409 is about 184.1957687154.

The spelling of 6249409 in words is "six million, two hundred forty-nine thousand, four hundred nine".