42361861 has 4 divisors (see below), whose sum is σ = 42395724. Its totient is φ = 42328000.

The previous prime is 42361859. The next prime is 42361867. The reversal of 42361861 is 16816324.

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 11902500 + 30459361 = 3450^2 + 5519^2 .

It is a cyclic number.

It is not a de Polignac number, because 42361861 - 2¹ = 42361859 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42361867) 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, 14980 + ... + 17581.

It is an arithmetic number, because the mean of its divisors is an integer number (10598931).

Almost surely, 2^42361861 is an apocalyptic number.

It is an amenable number.

42361861 is a deficient number, since it is larger than the sum of its proper divisors (33863).

42361861 is a wasteful number, since it uses less digits than its factorization.

42361861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33862.

The product of its digits is 6912, while the sum is 31.

The square root of 42361861 is about 6508.5990043941. The cubic root of 42361861 is about 348.5980956534.

The spelling of 42361861 in words is "forty-two million, three hundred sixty-one thousand, eight hundred sixty-one".