6401020 has 24 divisors (see below), whose sum is σ = 13503168. Its totient is φ = 2548800.

The previous prime is 6401011. The next prime is 6401029. The reversal of 6401020 is 201046.

It is an interprime number because it is at equal distance from previous prime (6401011) and next prime (6401029).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6401029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4830 + ... + 6010.

It is an arithmetic number, because the mean of its divisors is an integer number (562632).

Almost surely, 2^6401020 is an apocalyptic number.

It is an amenable number.

6401020 is an abundant number, since it is smaller than the sum of its proper divisors (7102148).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6401020 is a wasteful number, since it uses less digits than its factorization.

6401020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1461 (or 1459 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 6401020 is about 2530.0237153039. The cubic root of 6401020 is about 185.6734161968.

Adding to 6401020 its reverse (201046), we get a palindrome (6602066).

The spelling of 6401020 in words is "six million, four hundred one thousand, twenty".