400245 has 8 divisors (see below), whose sum is σ = 640416. Its totient is φ = 213456.

The previous prime is 400243. The next prime is 400247. The reversal of 400245 is 542004.

It is an interprime number because it is at equal distance from previous prime (400243) and next prime (400247).

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

It is not a de Polignac number, because 400245 - 2¹ = 400243 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15), and also a Moran number because the ratio is a prime number: 26683 = 400245 / (4 + 0 + 0 + 2 + 4 + 5).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13327 + ... + 13356.

It is an arithmetic number, because the mean of its divisors is an integer number (80052).

2⁴⁰⁰²⁴⁵ is an apocalyptic number.

It is an amenable number.

400245 is a deficient number, since it is larger than the sum of its proper divisors (240171).

400245 is a wasteful number, since it uses less digits than its factorization.

400245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26691.

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 400245 is about 632.6491918907. The cubic root of 400245 is about 73.6956700312.

Adding to 400245 its reverse (542004), we get a palindrome (942249).

The spelling of 400245 in words is "four hundred thousand, two hundred forty-five".