6420237 has 8 divisors (see below), whose sum is σ = 9063936. Its totient is φ = 4028352.

The previous prime is 6420221. The next prime is 6420259. The reversal of 6420237 is 7320246.

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

It is not a de Polignac number, because 6420237 - 2⁴ = 6420221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6420437) 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, 62893 + ... + 62994.

It is an arithmetic number, because the mean of its divisors is an integer number (1132992).

Almost surely, 2^6420237 is an apocalyptic number.

It is an amenable number.

6420237 is a deficient number, since it is larger than the sum of its proper divisors (2643699).

6420237 is a wasteful number, since it uses less digits than its factorization.

6420237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125907.

The product of its (nonzero) digits is 2016, while the sum is 24.

The square root of 6420237 is about 2533.8186596519. The cubic root of 6420237 is about 185.8590387646.

Subtracting 6420237 from its reverse (7320246), we obtain a palindrome (900009).

It can be divided in two parts, 64 and 20237, that added together give a triangular number (20301 = T₂₀₁).

The spelling of 6420237 in words is "six million, four hundred twenty thousand, two hundred thirty-seven".