1020142105 has 16 divisors (see below), whose sum is σ = 1262536704. Its totient is φ = 790836480.

The previous prime is 1020142099. The next prime is 1020142111. The reversal of 1020142105 is 5012410201.

It is an interprime number because it is at equal distance from previous prime (1020142099) and next prime (1020142111).

It is not a de Polignac number, because 1020142105 - 2⁵ = 1020142073 is a prime.

It is a Duffinian 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, 8625 + ... + 45985.

It is an arithmetic number, because the mean of its divisors is an integer number (78908544).

Almost surely, 2^1020142105 is an apocalyptic number.

It is an amenable number.

1020142105 is a deficient number, since it is larger than the sum of its proper divisors (242394599).

1020142105 is a wasteful number, since it uses less digits than its factorization.

1020142105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37536.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 1020142105 is about 31939.6635079332. The cubic root of 1020142105 is about 1006.6694544875.

Adding to 1020142105 its reverse (5012410201), we get a palindrome (6032552306).

The spelling of 1020142105 in words is "one billion, twenty million, one hundred forty-two thousand, one hundred five".