402591543 has 16 divisors (see below), whose sum is σ = 563594880. Its totient is φ = 255267936.

The previous prime is 402591533. The next prime is 402591547. The reversal of 402591543 is 345195204.

It is not a de Polignac number, because 402591543 - 2⁶ = 402591479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402591547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28705 + ... + 40362.

It is an arithmetic number, because the mean of its divisors is an integer number (35224680).

Almost surely, 2^402591543 is an apocalyptic number.

402591543 is a deficient number, since it is larger than the sum of its proper divisors (161003337).

402591543 is a wasteful number, since it uses less digits than its factorization.

402591543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69166.

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 402591543 is about 20064.6839745858. The cubic root of 402591543 is about 738.3940966195.

The spelling of 402591543 in words is "four hundred two million, five hundred ninety-one thousand, five hundred forty-three".