42869 has 4 divisors (see below), whose sum is σ = 43296. Its totient is φ = 42444.

The previous prime is 42863. The next prime is 42899. The reversal of 42869 is 96824.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 42869 - 2⁴ = 42853 is a prime.

It is a super-2 number, since 2×42869² = 3675502322, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32 + ... + 294.

It is an arithmetic number, because the mean of its divisors is an integer number (10824).

2⁴²⁸⁶⁹ is an apocalyptic number.

It is an amenable number.

42869 is a deficient number, since it is larger than the sum of its proper divisors (427).

42869 is a wasteful number, since it uses less digits than its factorization.

42869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426.

The product of its digits is 3456, while the sum is 29.

The square root of 42869 is about 207.0483035429. The cubic root of 42869 is about 34.9983672708.

It can be divided in two parts, 4 and 2869, that multiplied together give a triangular number (11476 = T₁₅₁).

The spelling of 42869 in words is "forty-two thousand, eight hundred sixty-nine".