42961937 has 4 divisors (see below), whose sum is σ = 43069476. Its totient is φ = 42854400.

The previous prime is 42961931. The next prime is 42961949. The reversal of 42961937 is 73916924.

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 40398736 + 2563201 = 6356^2 + 1601^2 .

It is a cyclic number.

It is not a de Polignac number, because 42961937 - 2¹⁶ = 42896401 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42961894 and 42961903.

It is not an unprimeable number, because it can be changed into a prime (42961931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53168 + ... + 53969.

It is an arithmetic number, because the mean of its divisors is an integer number (10767369).

Almost surely, 2^42961937 is an apocalyptic number.

It is an amenable number.

42961937 is a deficient number, since it is larger than the sum of its proper divisors (107539).

42961937 is a wasteful number, since it uses less digits than its factorization.

42961937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107538.

The product of its digits is 81648, while the sum is 41.

The square root of 42961937 is about 6554.5356052126. The cubic root of 42961937 is about 350.2364035532.

The spelling of 42961937 in words is "forty-two million, nine hundred sixty-one thousand, nine hundred thirty-seven".