742687 has 8 divisors (see below), whose sum is σ = 819072. Its totient is φ = 667800.

The previous prime is 742681. The next prime is 742697. The reversal of 742687 is 786247.

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 742687 - 2⁷ = 742559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (742681) 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, 862 + ... + 1492.

It is an arithmetic number, because the mean of its divisors is an integer number (102384).

2⁷⁴²⁶⁸⁷ is an apocalyptic number.

742687 is a deficient number, since it is larger than the sum of its proper divisors (76385).

742687 is a wasteful number, since it uses less digits than its factorization.

742687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 749.

The product of its digits is 18816, while the sum is 34.

The square root of 742687 is about 861.7928985551. The cubic root of 742687 is about 90.5597623237.

The spelling of 742687 in words is "seven hundred forty-two thousand, six hundred eighty-seven".