1021260105 has 48 divisors (see below), whose sum is σ = 1824863040. Its totient is φ = 528038784.

The previous prime is 1021260067. The next prime is 1021260113. The reversal of 1021260105 is 5010621201.

It is not a de Polignac number, because 1021260105 - 2⁸ = 1021259849 is a prime.

It is a super-2 number, since 2×1021260105² = 2085944404129222050, which contains 22 as substring.

It is a Curzon 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 47 ways as a sum of consecutive naturals, for example, 267067 + ... + 270863.

It is an arithmetic number, because the mean of its divisors is an integer number (38017980).

Almost surely, 2^1021260105 is an apocalyptic number.

1021260105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1021260105 is a deficient number, since it is larger than the sum of its proper divisors (803602935).

1021260105 is a wasteful number, since it uses less digits than its factorization.

1021260105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3990 (or 3987 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 1021260105 is about 31957.1604652228. The cubic root of 1021260105 is about 1007.0370652206.

Adding to 1021260105 its reverse (5010621201), we get a palindrome (6031881306).

The spelling of 1021260105 in words is "one billion, twenty-one million, two hundred sixty thousand, one hundred five".