742989 has 8 divisors (see below), whose sum is σ = 1066912. Its totient is φ = 457200.

The previous prime is 742981. The next prime is 742991. The reversal of 742989 is 989247.

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

It is not a de Polignac number, because 742989 - 2³ = 742981 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 19051 = 742989 / (7 + 4 + 2 + 9 + 8 + 9).

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (742981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9487 + ... + 9564.

It is an arithmetic number, because the mean of its divisors is an integer number (133364).

2⁷⁴²⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

742989 is a deficient number, since it is larger than the sum of its proper divisors (323923).

742989 is a wasteful number, since it uses less digits than its factorization.

742989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19067.

The product of its digits is 36288, while the sum is 39.

The square root of 742989 is about 861.9680968574. The cubic root of 742989 is about 90.5720354805.

The spelling of 742989 in words is "seven hundred forty-two thousand, nine hundred eighty-nine".