6420573 has 16 divisors (see below), whose sum is σ = 9770560. Its totient is φ = 4164048.

The previous prime is 6420523. The next prime is 6420587. The reversal of 6420573 is 3750246.

It is a happy number.

It is not a de Polignac number, because 6420573 - 2⁹ = 6420061 is a prime.

It is a super-5 number, since 5×6420573⁵ (a number of 35 digits) contains 55555 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6420523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2215 + ... + 4212.

It is an arithmetic number, because the mean of its divisors is an integer number (610660).

Almost surely, 2^6420573 is an apocalyptic number.

It is an amenable number.

6420573 is a deficient number, since it is larger than the sum of its proper divisors (3349987).

6420573 is a wasteful number, since it uses less digits than its factorization.

6420573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6473 (or 6467 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 6420573 is about 2533.8849618718. The cubic root of 6420573 is about 185.8622809890.

The spelling of 6420573 in words is "six million, four hundred twenty thousand, five hundred seventy-three".