10400143 has 4 divisors (see below), whose sum is σ = 11200168. Its totient is φ = 9600120.

The previous prime is 10400129. The next prime is 10400147. The reversal of 10400143 is 34100401.

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 10400143 - 2²¹ = 8302991 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 800011 = 10400143 / (1 + 0 + 4 + 0 + 0 + 1 + 4 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10400147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 399993 + ... + 400018.

It is an arithmetic number, because the mean of its divisors is an integer number (2800042).

Almost surely, 2^10400143 is an apocalyptic number.

10400143 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

10400143 is a deficient number, since it is larger than the sum of its proper divisors (800025).

10400143 is an equidigital number, since it uses as much as digits as its factorization.

10400143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800024.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 10400143 is about 3224.9252704520. The cubic root of 10400143 is about 218.2795770511.

Adding to 10400143 its reverse (34100401), we get a palindrome (44500544).

The spelling of 10400143 in words is "ten million, four hundred thousand, one hundred forty-three".