42861613 has 4 divisors (see below), whose sum is σ = 42983388. Its totient is φ = 42739840.

The previous prime is 42861601. The next prime is 42861617. The reversal of 42861613 is 31616824.

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 8779369 + 34082244 = 2963^2 + 5838^2 .

It is a cyclic number.

It is not a de Polignac number, because 42861613 - 2²¹ = 40764461 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 (42861617) 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, 60358 + ... + 61063.

It is an arithmetic number, because the mean of its divisors is an integer number (10745847).

Almost surely, 2^42861613 is an apocalyptic number.

It is an amenable number.

42861613 is a deficient number, since it is larger than the sum of its proper divisors (121775).

42861613 is a wasteful number, since it uses less digits than its factorization.

42861613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121774.

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

The square root of 42861613 is about 6546.8781109778. The cubic root of 42861613 is about 349.9635689972.

The spelling of 42861613 in words is "forty-two million, eight hundred sixty-one thousand, six hundred thirteen".