42687747 has 12 divisors (see below), whose sum is σ = 64341264. Its totient is φ = 27221040.

The previous prime is 42687727. The next prime is 42687761. The reversal of 42687747 is 74778624.

It is not a de Polignac number, because 42687747 - 2¹⁰ = 42686723 is a prime.

It is a super-3 number, since 3×42687747³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (42687727) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 102904 + ... + 103317.

It is an arithmetic number, because the mean of its divisors is an integer number (5361772).

Almost surely, 2^42687747 is an apocalyptic number.

42687747 is a deficient number, since it is larger than the sum of its proper divisors (21653517).

42687747 is a wasteful number, since it uses less digits than its factorization.

42687747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206250 (or 206247 counting only the distinct ones).

The product of its digits is 526848, while the sum is 45.

The square root of 42687747 is about 6533.5860750433. The cubic root of 42687747 is about 349.4897244426.

It can be divided in two parts, 42687 and 747, that added together give a palindrome (43434).

The spelling of 42687747 in words is "forty-two million, six hundred eighty-seven thousand, seven hundred forty-seven".