42959849 has 4 divisors (see below), whose sum is σ = 44120964. Its totient is φ = 41798736.

The previous prime is 42959809. The next prime is 42959857. The reversal of 42959849 is 94895924.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25050025 + 17909824 = 5005^2 + 4232^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42959849 is a prime.

It is a super-2 number, since 2×42959849² = 3691097252205602, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42959797 and 42959806.

It is not an unprimeable number, because it can be changed into a prime (42959809) 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, 580502 + ... + 580575.

It is an arithmetic number, because the mean of its divisors is an integer number (11030241).

Almost surely, 2^42959849 is an apocalyptic number.

It is an amenable number.

42959849 is a deficient number, since it is larger than the sum of its proper divisors (1161115).

42959849 is a wasteful number, since it uses less digits than its factorization.

42959849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1161114.

The product of its digits is 933120, while the sum is 50.

The square root of 42959849 is about 6554.3763242585. The cubic root of 42959849 is about 350.2307294961.

The spelling of 42959849 in words is "forty-two million, nine hundred fifty-nine thousand, eight hundred forty-nine".