7142989 has 8 divisors (see below), whose sum is σ = 8427008. Its totient is φ = 5924880.

The previous prime is 7142987. The next prime is 7143001. The reversal of 7142989 is 9892417.

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

It is a cyclic number.

It is not a de Polignac number, because 7142989 - 2¹ = 7142987 is a prime.

It is a Duffinian number.

7142989 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7142981) 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, 16242 + ... + 16675.

It is an arithmetic number, because the mean of its divisors is an integer number (1053376).

Almost surely, 2^7142989 is an apocalyptic number.

It is an amenable number.

7142989 is a deficient number, since it is larger than the sum of its proper divisors (1284019).

7142989 is a wasteful number, since it uses less digits than its factorization.

7142989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32955.

The product of its digits is 36288, while the sum is 40.

The square root of 7142989 is about 2672.6370872230. The cubic root of 7142989 is about 192.5868635920.

The spelling of 7142989 in words is "seven million, one hundred forty-two thousand, nine hundred eighty-nine".