1000571000 has 128 divisors (see below), whose sum is σ = 2751053760. Its totient is φ = 335808000.

The previous prime is 1000570997. The next prime is 1000571009. The reversal of 1000571000 is 1750001.

It is a super-2 number, since 2×1000571000² = 2002284652082000000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000571009) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 139502 + ... + 146498.

Almost surely, 2^1000571000 is an apocalyptic number.

1000571000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1000571000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1375526880).

1000571000 is an abundant number, since it is smaller than the sum of its proper divisors (1750482760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1000571000 is a wasteful number, since it uses less digits than its factorization.

1000571000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7042 (or 7028 counting only the distinct ones).

The product of its (nonzero) digits is 35, while the sum is 14.

The square root of 1000571000 is about 31631.8036159812. The cubic root of 1000571000 is about 1000.1902971180.

The spelling of 1000571000 in words is "one billion, five hundred seventy-one thousand".