840086542 has 8 divisors (see below), whose sum is σ = 1273121136. Its totient is φ = 415712832.

The previous prime is 840086531. The next prime is 840086557. The reversal of 840086542 is 245680048.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2164978 + ... + 2165365.

It is an arithmetic number, because the mean of its divisors is an integer number (159140142).

Almost surely, 2^840086542 is an apocalyptic number.

840086542 is a deficient number, since it is larger than the sum of its proper divisors (433034594).

840086542 is a wasteful number, since it uses less digits than its factorization.

840086542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4330442.

The product of its (nonzero) digits is 61440, while the sum is 37.

The square root of 840086542 is about 28984.2464452675. The cubic root of 840086542 is about 943.5711980198.

It can be divided in two parts, 8400865 and 42, that multiplied together give a triangular number (352836330 = T₂₆₅₆₄).

The spelling of 840086542 in words is "eight hundred forty million, eighty-six thousand, five hundred forty-two".