42087542 has 16 divisors (see below), whose sum is σ = 72264192. Its totient is φ = 18009000.

The previous prime is 42087541. The next prime is 42087587. The reversal of 42087542 is 24578024.

It is a super-2 number, since 2×42087542² = 3542722383203528, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42087499 and 42087508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42087541) 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, 8513 + ... + 12515.

It is an arithmetic number, because the mean of its divisors is an integer number (4516512).

Almost surely, 2^42087542 is an apocalyptic number.

42087542 is a deficient number, since it is larger than the sum of its proper divisors (30176650).

42087542 is a wasteful number, since it uses less digits than its factorization.

42087542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4763.

The product of its (nonzero) digits is 17920, while the sum is 32.

The square root of 42087542 is about 6487.4911945990. The cubic root of 42087542 is about 347.8440034960.

The spelling of 42087542 in words is "forty-two million, eighty-seven thousand, five hundred forty-two".