400412543 has 8 divisors (see below), whose sum is σ = 442399968. Its totient is φ = 360473344.

The previous prime is 400412539. The next prime is 400412549. The reversal of 400412543 is 345214004.

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 400412543 - 2² = 400412539 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400412549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 511646 + ... + 512427.

It is an arithmetic number, because the mean of its divisors is an integer number (55299996).

Almost surely, 2^400412543 is an apocalyptic number.

400412543 is a deficient number, since it is larger than the sum of its proper divisors (41987425).

400412543 is a wasteful number, since it uses less digits than its factorization.

400412543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1024113.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 400412543 is about 20010.3109171247. The cubic root of 400412543 is about 737.0595162635.

Adding to 400412543 its reverse (345214004), we get a palindrome (745626547).

The spelling of 400412543 in words is "four hundred million, four hundred twelve thousand, five hundred forty-three".