401231205 has 32 divisors (see below), whose sum is σ = 744318720. Its totient is φ = 204684480.

The previous prime is 401231203. The next prime is 401231209. The reversal of 401231205 is 502132104.

It is not a de Polignac number, because 401231205 - 2¹ = 401231203 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401231203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61506 + ... + 67715.

It is an arithmetic number, because the mean of its divisors is an integer number (23259960).

Almost surely, 2^401231205 is an apocalyptic number.

401231205 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

401231205 is a deficient number, since it is larger than the sum of its proper divisors (343087515).

401231205 is a wasteful number, since it uses less digits than its factorization.

401231205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129258 (or 129252 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 401231205 is about 20030.7564759796. The cubic root of 401231205 is about 737.5614917606.

Adding to 401231205 its reverse (502132104), we get a palindrome (903363309).

It can be divided in two parts, 40123 and 1205, that added together give a triangular number (41328 = T₂₈₇).

The spelling of 401231205 in words is "four hundred one million, two hundred thirty-one thousand, two hundred five".