84242140 has 24 divisors (see below), whose sum is σ = 187315632. Its totient is φ = 31714560.

The previous prime is 84242113. The next prime is 84242141. The reversal of 84242140 is 4124248.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84242141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123546 + ... + 124225.

It is an arithmetic number, because the mean of its divisors is an integer number (7804818).

Almost surely, 2^84242140 is an apocalyptic number.

It is an amenable number.

84242140 is an abundant number, since it is smaller than the sum of its proper divisors (103073492).

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

84242140 is a wasteful number, since it uses less digits than its factorization.

84242140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247797 (or 247795 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 25.

The square root of 84242140 is about 9178.3517038736. The cubic root of 84242140 is about 438.3723264606.

Adding to 84242140 its reverse (4124248), we get a palindrome (88366388).

The spelling of 84242140 in words is "eighty-four million, two hundred forty-two thousand, one hundred forty".