9142840 has 32 divisors (see below), whose sum is σ = 23510880. Its totient is φ = 3134592.

The previous prime is 9142831. The next prime is 9142843. The reversal of 9142840 is 482419.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 9142799 and 9142808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9142843) 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, 16047 + ... + 16606.

It is an arithmetic number, because the mean of its divisors is an integer number (734715).

Almost surely, 2^9142840 is an apocalyptic number.

It is an amenable number.

9142840 is an abundant number, since it is smaller than the sum of its proper divisors (14368040).

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

9142840 is a wasteful number, since it uses less digits than its factorization.

9142840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32671 (or 32667 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 9142840 is about 3023.7129493389. The cubic root of 9142840 is about 209.1030527403.

The spelling of 9142840 in words is "nine million, one hundred forty-two thousand, eight hundred forty".