6450247 has 4 divisors (see below), whose sum is σ = 6624616. Its totient is φ = 6275880.

The previous prime is 6450229. The next prime is 6450251. The reversal of 6450247 is 7420546.

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 6450247 - 2¹⁵ = 6417479 is a prime.

It is a super-2 number, since 2×6450247² = 83211372722018, which contains 22 as substring.

It is a Duffinian number.

6450247 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6450217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87129 + ... + 87202.

It is an arithmetic number, because the mean of its divisors is an integer number (1656154).

Almost surely, 2^6450247 is an apocalyptic number.

6450247 is a deficient number, since it is larger than the sum of its proper divisors (174369).

6450247 is a wasteful number, since it uses less digits than its factorization.

6450247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174368.

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 6450247 is about 2539.7336474520. The cubic root of 6450247 is about 186.1481746007.

Subtracting 6450247 from its reverse (7420546), we obtain a cube (970299 = 99³).

The spelling of 6450247 in words is "six million, four hundred fifty thousand, two hundred forty-seven".