6401231 has 8 divisors (see below), whose sum is σ = 6816384. Its totient is φ = 5990400.

The previous prime is 6401203. The next prime is 6401249. The reversal of 6401231 is 1321046.

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 6401231 - 2²² = 2206927 is a prime.

It is a super-2 number, since 2×6401231² = 81951516630722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6401831) 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, 2306 + ... + 4256.

It is an arithmetic number, because the mean of its divisors is an integer number (852048).

Almost surely, 2^6401231 is an apocalyptic number.

6401231 is a deficient number, since it is larger than the sum of its proper divisors (415153).

6401231 is a wasteful number, since it uses less digits than its factorization.

6401231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2161.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 6401231 is about 2530.0654141741. The cubic root of 6401231 is about 185.6754563228.

Adding to 6401231 its reverse (1321046), we get a palindrome (7722277).

The spelling of 6401231 in words is "six million, four hundred one thousand, two hundred thirty-one".