1000646101 has 12 divisors (see below), whose sum is σ = 1253557452. Its totient is φ = 791719488.

The previous prime is 1000646071. The next prime is 1000646107. The reversal of 1000646101 is 1016460001.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 133402500 + 867243601 = 11550^2 + 29449^2 .

It is not a de Polignac number, because 1000646101 - 2⁷ = 1000645973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000646107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 784800 + ... + 786073.

It is an arithmetic number, because the mean of its divisors is an integer number (104463121).

Almost surely, 2^1000646101 is an apocalyptic number.

It is an amenable number.

1000646101 is a deficient number, since it is larger than the sum of its proper divisors (252911351).

1000646101 is a wasteful number, since it uses less digits than its factorization.

1000646101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1570900 (or 1570893 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 1000646101 is about 31632.9907059070. The cubic root of 1000646101 is about 1000.2153206337.

The spelling of 1000646101 in words is "one billion, six hundred forty-six thousand, one hundred one".