6420045 has 8 divisors (see below), whose sum is σ = 10272096. Its totient is φ = 3424016.

The previous prime is 6420041. The next prime is 6420053. The reversal of 6420045 is 5400246.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6420045 - 2² = 6420041 is a prime.

6420045 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6420041) 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 7 ways as a sum of consecutive naturals, for example, 213987 + ... + 214016.

It is an arithmetic number, because the mean of its divisors is an integer number (1284012).

Almost surely, 2^6420045 is an apocalyptic number.

It is an amenable number.

6420045 is a deficient number, since it is larger than the sum of its proper divisors (3852051).

6420045 is a wasteful number, since it uses less digits than its factorization.

6420045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428011.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 6420045 is about 2533.7807718901. The cubic root of 6420045 is about 185.8571860142.

The spelling of 6420045 in words is "six million, four hundred twenty thousand, forty-five".