400125203 has 4 divisors (see below), whose sum is σ = 403666248. Its totient is φ = 396584160.

The previous prime is 400125179. The next prime is 400125217. The reversal of 400125203 is 302521004.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 400125203 - 2⁸ = 400124947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400125263) 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 3 ways as a sum of consecutive naturals, for example, 1770353 + ... + 1770578.

It is an arithmetic number, because the mean of its divisors is an integer number (100916562).

Almost surely, 2^400125203 is an apocalyptic number.

400125203 is a deficient number, since it is larger than the sum of its proper divisors (3541045).

400125203 is a wasteful number, since it uses less digits than its factorization.

400125203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3541044.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 400125203 is about 20003.1298301041. The cubic root of 400125203 is about 736.8831670079.

Adding to 400125203 its reverse (302521004), we get a palindrome (702646207).

The spelling of 400125203 in words is "four hundred million, one hundred twenty-five thousand, two hundred three".