400203245 has 8 divisors (see below), whose sum is σ = 517185816. Its totient is φ = 295534656.

The previous prime is 400203217. The next prime is 400203253. The reversal of 400203245 is 542302004.

It can be written as a sum of positive squares in 4 ways, for example, as 33327529 + 366875716 = 5773^2 + 19154^2 .

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 400203245 - 2¹⁴ = 400186861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3078422 + ... + 3078551.

It is an arithmetic number, because the mean of its divisors is an integer number (64648227).

Almost surely, 2^400203245 is an apocalyptic number.

It is an amenable number.

400203245 is a deficient number, since it is larger than the sum of its proper divisors (116982571).

400203245 is a wasteful number, since it uses less digits than its factorization.

400203245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6156991.

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 400203245 is about 20005.0804797181. The cubic root of 400203245 is about 736.9310720947.

Adding to 400203245 its reverse (542302004), we get a palindrome (942505249).

The spelling of 400203245 in words is "four hundred million, two hundred three thousand, two hundred forty-five".