742688 has 12 divisors (see below), whose sum is σ = 1462230. Its totient is φ = 371328.

The previous prime is 742681. The next prime is 742697. The reversal of 742688 is 886247.

It can be written as a sum of positive squares in only one way, i.e., 559504 + 183184 = 748^2 + 428^2 .

It is an Ulam number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (742681) by changing a digit.

742688 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11573 + ... + 11636.

2⁷⁴²⁶⁸⁸ is an apocalyptic number.

It is an amenable number.

742688 is a deficient number, since it is larger than the sum of its proper divisors (719542).

742688 is a wasteful number, since it uses less digits than its factorization.

742688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23219 (or 23211 counting only the distinct ones).

The product of its digits is 21504, while the sum is 35.

The square root of 742688 is about 861.7934787407. The cubic root of 742688 is about 90.5598029688.

The spelling of 742688 in words is "seven hundred forty-two thousand, six hundred eighty-eight".