42281413 has 4 divisors (see below), whose sum is σ = 42295500. Its totient is φ = 42267328.

The previous prime is 42281401. The next prime is 42281461. The reversal of 42281413 is 31418224.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 2553604 + 39727809 = 1598^2 + 6303^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42281413 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 (42282413) 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, 538 + ... + 9211.

It is an arithmetic number, because the mean of its divisors is an integer number (10573875).

Almost surely, 2^42281413 is an apocalyptic number.

It is an amenable number.

42281413 is a deficient number, since it is larger than the sum of its proper divisors (14087).

42281413 is an equidigital number, since it uses as much as digits as its factorization.

42281413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14086.

The product of its digits is 1536, while the sum is 25.

The square root of 42281413 is about 6502.4159356350. The cubic root of 42281413 is about 348.3772854704.

Adding to 42281413 its reverse (31418224), we get a palindrome (73699637).

The spelling of 42281413 in words is "forty-two million, two hundred eighty-one thousand, four hundred thirteen".