42115431 has 8 divisors (see below), whose sum is σ = 57348864. Its totient is φ = 27479480.

The previous prime is 42115429. The next prime is 42115433. The reversal of 42115431 is 13451124.

It is an interprime number because it is at equal distance from previous prime (42115429) and next prime (42115433).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42115431 - 2¹ = 42115429 is a prime.

It is a super-2 number, since 2×42115431² = 3547419056631522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42115398 and 42115407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42115433) 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 7 ways as a sum of consecutive naturals, for example, 149205 + ... + 149486.

It is an arithmetic number, because the mean of its divisors is an integer number (7168608).

Almost surely, 2^42115431 is an apocalyptic number.

42115431 is a deficient number, since it is larger than the sum of its proper divisors (15233433).

42115431 is a wasteful number, since it uses less digits than its factorization.

42115431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298741.

The product of its digits is 480, while the sum is 21.

The square root of 42115431 is about 6489.6402827892. The cubic root of 42115431 is about 347.9208186213.

Adding to 42115431 its reverse (13451124), we get a palindrome (55566555).

The spelling of 42115431 in words is "forty-two million, one hundred fifteen thousand, four hundred thirty-one".