1001205105 has 16 divisors (see below), whose sum is σ = 1603011264. Its totient is φ = 533615040.

The previous prime is 1001205091. The next prime is 1001205113. The reversal of 1001205105 is 5015021001.

It is not a de Polignac number, because 1001205105 - 2⁸ = 1001204849 is a prime.

It is a super-2 number, since 2×1001205105² = 2004823324556122050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1167 + ... + 44763.

It is an arithmetic number, because the mean of its divisors is an integer number (100188204).

Almost surely, 2^1001205105 is an apocalyptic number.

1001205105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1001205105 is a deficient number, since it is larger than the sum of its proper divisors (601806159).

1001205105 is a wasteful number, since it uses less digits than its factorization.

1001205105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45136.

The product of its (nonzero) digits is 50, while the sum is 15.

The square root of 1001205105 is about 31641.8252476054. The cubic root of 1001205105 is about 1000.4015404104.

Adding to 1001205105 its reverse (5015021001), we get a palindrome (6016226106).

The spelling of 1001205105 in words is "one billion, one million, two hundred five thousand, one hundred five".