401205243 has 8 divisors (see below), whose sum is σ = 536177488. Its totient is φ = 266851584.

The previous prime is 401205223. The next prime is 401205271. The reversal of 401205243 is 342502104.

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

It is not a de Polignac number, because 401205243 - 2¹⁸ = 400943099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401205223) 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, 153130 + ... + 155727.

It is an arithmetic number, because the mean of its divisors is an integer number (67022186).

Almost surely, 2^401205243 is an apocalyptic number.

401205243 is a deficient number, since it is larger than the sum of its proper divisors (134972245).

401205243 is a wasteful number, since it uses less digits than its factorization.

401205243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309293.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 401205243 is about 20030.1084120880. The cubic root of 401205243 is about 737.5455832402.

Adding to 401205243 its reverse (342502104), we get a palindrome (743707347).

The spelling of 401205243 in words is "four hundred one million, two hundred five thousand, two hundred forty-three".