742787 has 4 divisors (see below), whose sum is σ = 745056. Its totient is φ = 740520.

The previous prime is 742783. The next prime is 742789. The reversal of 742787 is 787247.

742787 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 787247 = 193 ⋅4079.

It is a cyclic number.

It is not a de Polignac number, because 742787 - 2² = 742783 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (742783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 539 + ... + 1332.

It is an arithmetic number, because the mean of its divisors is an integer number (186264).

2⁷⁴²⁷⁸⁷ is an apocalyptic number.

742787 is a deficient number, since it is larger than the sum of its proper divisors (2269).

742787 is a wasteful number, since it uses less digits than its factorization.

742787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2268.

The product of its digits is 21952, while the sum is 35.

The square root of 742787 is about 861.8509151820. The cubic root of 742787 is about 90.5638266513.

The spelling of 742787 in words is "seven hundred forty-two thousand, seven hundred eighty-seven".