999428571 has 16 divisors (see below), whose sum is σ = 1520653600. Its totient is φ = 648277344.

The previous prime is 999428531. The next prime is 999428581. The reversal of 999428571 is 175824999.

It is not a de Polignac number, because 999428571 - 2¹³ = 999420379 is a prime.

It is a super-2 number, since 2×999428571² = 1997714937062204082, which contains 22 as substring.

It is a Duffinian number.

999428571 is a modest number, since divided by 428571 gives 999 as remainder.

It is not an unprimeable number, because it can be changed into a prime (999428501) 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, 499216 + ... + 501213.

It is an arithmetic number, because the mean of its divisors is an integer number (95040850).

Almost surely, 2^999428571 is an apocalyptic number.

999428571 is a deficient number, since it is larger than the sum of its proper divisors (521225029).

999428571 is a wasteful number, since it uses less digits than its factorization.

999428571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000475 (or 1000469 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 54.

The square root of 999428571 is about 31613.7402247820. The cubic root of 999428571 is about 999.8094873739.

It can be divided in two parts, 999428 and 571, that added together give a palindrome (999999).

The spelling of 999428571 in words is "nine hundred ninety-nine million, four hundred twenty-eight thousand, five hundred seventy-one".