1001861445 has 32 divisors (see below), whose sum is σ = 1768402944. Its totient is φ = 481190400.

The previous prime is 1001861423. The next prime is 1001861453. The reversal of 1001861445 is 5441681001.

It is not a de Polignac number, because 1001861445 - 2⁶ = 1001861381 is a prime.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 54661 + ... + 70650.

It is an arithmetic number, because the mean of its divisors is an integer number (55262592).

Almost surely, 2^1001861445 is an apocalyptic number.

1001861445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1001861445 is a deficient number, since it is larger than the sum of its proper divisors (766541499).

1001861445 is a wasteful number, since it uses less digits than its factorization.

1001861445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125373.

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 1001861445 is about 31652.1949475862. The cubic root of 1001861445 is about 1000.6200970668.

The spelling of 1001861445 in words is "one billion, one million, eight hundred sixty-one thousand, four hundred forty-five".