42861481 has 4 divisors (see below), whose sum is σ = 46158532. Its totient is φ = 39564432.

The previous prime is 42861479. The next prime is 42861491. The reversal of 42861481 is 18416824.

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 3686400 + 39175081 = 1920^2 + 6259^2 .

It is a cyclic number.

It is not a de Polignac number, because 42861481 - 2¹ = 42861479 is a prime.

It is a super-2 number, since 2×42861481² = 3674213107026722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42861431) 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, 1648506 + ... + 1648531.

It is an arithmetic number, because the mean of its divisors is an integer number (11539633).

Almost surely, 2^42861481 is an apocalyptic number.

It is an amenable number.

42861481 is a deficient number, since it is larger than the sum of its proper divisors (3297051).

42861481 is a wasteful number, since it uses less digits than its factorization.

42861481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3297050.

The product of its digits is 12288, while the sum is 34.

The square root of 42861481 is about 6546.8680298292. The cubic root of 42861481 is about 349.9632097384.

The spelling of 42861481 in words is "forty-two million, eight hundred sixty-one thousand, four hundred eighty-one".