400143 has 8 divisors (see below), whose sum is σ = 540288. Its totient is φ = 263384.

The previous prime is 400123. The next prime is 400151. The reversal of 400143 is 341004.

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 400143 - 2⁸ = 399887 is a prime.

It is a super-2 number, since 2×400143² = 320228840898, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400123) 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, 555 + ... + 1052.

It is an arithmetic number, because the mean of its divisors is an integer number (67536).

2⁴⁰⁰¹⁴³ is an apocalyptic number.

400143 is a deficient number, since it is larger than the sum of its proper divisors (140145).

400143 is a wasteful number, since it uses less digits than its factorization.

400143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1693.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 400143 is about 632.5685733579. The cubic root of 400143 is about 73.6894092018.

Adding to 400143 its reverse (341004), we get a palindrome (741147).

The spelling of 400143 in words is "four hundred thousand, one hundred forty-three", and thus it is an iban number.