401026543 has 2 divisors, whose sum is σ = 401026544. Its totient is φ = 401026542.

The previous prime is 401026541. The next prime is 401026553. The reversal of 401026543 is 345620104.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 401026543 - 2¹ = 401026541 is a prime.

Together with 401026541, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401026541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200513271 + 200513272.

It is an arithmetic number, because the mean of its divisors is an integer number (200513272).

Almost surely, 2^401026543 is an apocalyptic number.

401026543 is a deficient number, since it is larger than the sum of its proper divisors (1).

401026543 is an equidigital number, since it uses as much as digits as its factorization.

401026543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 401026543 is about 20025.6471306173. The cubic root of 401026543 is about 737.4360640925.

Adding to 401026543 its reverse (345620104), we get a palindrome (746646647).

The spelling of 401026543 in words is "four hundred one million, twenty-six thousand, five hundred forty-three".