7142840 has 16 divisors (see below), whose sum is σ = 16071480. Its totient is φ = 2857120.

The previous prime is 7142833. The next prime is 7142851. The reversal of 7142840 is 482417.

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, 89246 + ... + 89325.

Almost surely, 2^7142840 is an apocalyptic number.

It is an amenable number.

7142840 is an abundant number, since it is smaller than the sum of its proper divisors (8928640).

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

7142840 is a wasteful number, since it uses less digits than its factorization.

7142840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178582 (or 178578 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 7142840 is about 2672.6092119874. The cubic root of 7142840 is about 192.5855244868.

The spelling of 7142840 in words is "seven million, one hundred forty-two thousand, eight hundred forty".