42891135 has 32 divisors (see below), whose sum is σ = 80965632. Its totient is φ = 18973440.

The previous prime is 42891133. The next prime is 42891137. The reversal of 42891135 is 53119824.

It is an interprime number because it is at equal distance from previous prime (42891133) and next prime (42891137).

It is not a de Polignac number, because 42891135 - 2¹ = 42891133 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42891096 and 42891105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42891133) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3334 + ... + 9843.

It is an arithmetic number, because the mean of its divisors is an integer number (2530176).

Almost surely, 2^42891135 is an apocalyptic number.

42891135 is a deficient number, since it is larger than the sum of its proper divisors (38074497).

42891135 is a wasteful number, since it uses less digits than its factorization.

42891135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13223.

The product of its digits is 8640, while the sum is 33.

The square root of 42891135 is about 6549.1323852859. The cubic root of 42891135 is about 350.0438992555.

The spelling of 42891135 in words is "forty-two million, eight hundred ninety-one thousand, one hundred thirty-five".