42687494 has 16 divisors (see below), whose sum is σ = 67350528. Its totient is φ = 20252232.

The previous prime is 42687487. The next prime is 42687499. The reversal of 42687494 is 49478624.

It is a super-3 number, since 3×42687494³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42687499) 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, 2189 + ... + 9495.

It is an arithmetic number, because the mean of its divisors is an integer number (4209408).

Almost surely, 2^42687494 is an apocalyptic number.

42687494 is a deficient number, since it is larger than the sum of its proper divisors (24663034).

42687494 is a wasteful number, since it uses less digits than its factorization.

42687494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7459.

The product of its digits is 387072, while the sum is 44.

The square root of 42687494 is about 6533.5667135187. The cubic root of 42687494 is about 349.4890339941.

The spelling of 42687494 in words is "forty-two million, six hundred eighty-seven thousand, four hundred ninety-four".