742987 has 12 divisors (see below), whose sum is σ = 882360. Its totient is φ = 623616.

The previous prime is 742981. The next prime is 742991. The reversal of 742987 is 789247.

It is a happy number.

It is not a de Polignac number, because 742987 - 2¹¹ = 740939 is a prime.

It is a Duffinian 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 11 ways as a sum of consecutive naturals, for example, 2763 + ... + 3019.

It is an arithmetic number, because the mean of its divisors is an integer number (73530).

2⁷⁴²⁹⁸⁷ is an apocalyptic number.

742987 is a deficient number, since it is larger than the sum of its proper divisors (139373).

742987 is a wasteful number, since it uses less digits than its factorization.

742987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330 (or 323 counting only the distinct ones).

The product of its digits is 28224, while the sum is 37.

The square root of 742987 is about 861.9669367209. The cubic root of 742987 is about 90.5719542123.

It can be divided in two parts, 74298 and 7, that added together give a triangular number (74305 = T₃₈₅).

The spelling of 742987 in words is "seven hundred forty-two thousand, nine hundred eighty-seven".