142186840 has 16 divisors (see below), whose sum is σ = 319920480. Its totient is φ = 56874720.

The previous prime is 142186831. The next prime is 142186859. The reversal of 142186840 is 48681241.

142186840 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 142186796 and 142186805.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1777296 + ... + 1777375.

It is an arithmetic number, because the mean of its divisors is an integer number (19995030).

Almost surely, 2^142186840 is an apocalyptic number.

142186840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142186840 is an abundant number, since it is smaller than the sum of its proper divisors (177733640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

142186840 is a wasteful number, since it uses less digits than its factorization.

142186840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3554682 (or 3554678 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 34.

The square root of 142186840 is about 11924.2123429600. The cubic root of 142186840 is about 521.9390620917.

It can be divided in two parts, 142186 and 840, that multiplied together give a triangular number (119436240 = T₁₅₄₅₅).

The spelling of 142186840 in words is "one hundred forty-two million, one hundred eighty-six thousand, eight hundred forty".