42949 has 4 divisors (see below), whose sum is σ = 44460. Its totient is φ = 41440.

The previous prime is 42943. The next prime is 42953. The reversal of 42949 is 94924.

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 20449 + 22500 = 143^2 + 150^2 .

It is a cyclic number.

It is not a de Polignac number, because 42949 - 2⁷ = 42821 is a prime.

It is a Duffinian number.

42949 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42943) 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, 712 + ... + 769.

It is an arithmetic number, because the mean of its divisors is an integer number (11115).

2⁴²⁹⁴⁹ is an apocalyptic number.

It is an amenable number.

42949 is a deficient number, since it is larger than the sum of its proper divisors (1511).

42949 is a wasteful number, since it uses less digits than its factorization.

42949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1510.

The product of its digits is 2592, while the sum is 28.

The square root of 42949 is about 207.2414051294. The cubic root of 42949 is about 35.0201244809.

The spelling of 42949 in words is "forty-two thousand, nine hundred forty-nine".