6420101 has 4 divisors (see below), whose sum is σ = 6797772. Its totient is φ = 6042432.

The previous prime is 6420079. The next prime is 6420103. The reversal of 6420101 is 1010246.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1010246 = 2 ⋅505123.

It can be written as a sum of positive squares in 2 ways, for example, as 3441025 + 2979076 = 1855^2 + 1726^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6420101 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6420103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188810 + ... + 188843.

It is an arithmetic number, because the mean of its divisors is an integer number (1699443).

Almost surely, 2^6420101 is an apocalyptic number.

It is an amenable number.

6420101 is a deficient number, since it is larger than the sum of its proper divisors (377671).

6420101 is a wasteful number, since it uses less digits than its factorization.

6420101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377670.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 6420101 is about 2533.7918225458. The cubic root of 6420101 is about 185.8577264035.

Adding to 6420101 its reverse (1010246), we get a palindrome (7430347).

The spelling of 6420101 in words is "six million, four hundred twenty thousand, one hundred one".