42870105 has 12 divisors (see below), whose sum is σ = 74308260. Its totient is φ = 22864032.

The previous prime is 42870101. The next prime is 42870119. The reversal of 42870105 is 50107824.

It can be written as a sum of positive squares in 2 ways, for example, as 27846729 + 15023376 = 5277^2 + 3876^2 .

It is not a de Polignac number, because 42870105 - 2² = 42870101 is a prime.

It is a super-2 number, since 2×42870105² = 3675691805422050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42870101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 476290 + ... + 476379.

It is an arithmetic number, because the mean of its divisors is an integer number (6192355).

Almost surely, 2^42870105 is an apocalyptic number.

42870105 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42870105 is a deficient number, since it is larger than the sum of its proper divisors (31438155).

42870105 is a wasteful number, since it uses less digits than its factorization.

42870105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 952680 (or 952677 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 42870105 is about 6547.5266322482. The cubic root of 42870105 is about 349.9866797652.

Adding to 42870105 its reverse (50107824), we get a palindrome (92977929).

The spelling of 42870105 in words is "forty-two million, eight hundred seventy thousand, one hundred five".