42757631 has 8 divisors (see below), whose sum is σ = 48936480. Its totient is φ = 36596448.

The previous prime is 42757579. The next prime is 42757679. The reversal of 42757631 is 13675724.

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

It is not a de Polignac number, because 42757631 - 2¹⁰ = 42756607 is a prime.

It is a super-2 number, since 2×42757631² = 3656430017464322, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 42757591 and 42757600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42757331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1265 + ... + 9333.

It is an arithmetic number, because the mean of its divisors is an integer number (6117060).

Almost surely, 2^42757631 is an apocalyptic number.

42757631 is a deficient number, since it is larger than the sum of its proper divisors (6178849).

42757631 is an equidigital number, since it uses as much as digits as its factorization.

42757631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8833.

The product of its digits is 35280, while the sum is 35.

The square root of 42757631 is about 6538.9319464267. The cubic root of 42757631 is about 349.6803367042.

The spelling of 42757631 in words is "forty-two million, seven hundred fifty-seven thousand, six hundred thirty-one".