742678 has 4 divisors (see below), whose sum is σ = 1114020. Its totient is φ = 371338.

The previous prime is 742673. The next prime is 742681. The reversal of 742678 is 876247.

742678 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: 876247 = 641 ⋅1367.

It is a super-2 number, since 2×742678² = 1103141223368, which contains 22 as substring.

It is a d-powerful number, because it can be written as 7⁴ + 4⁸ + 6² + 2¹⁹ + 7⁶ + 8⁵ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (742673) by changing a digit.

742678 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, 185668 + ... + 185671.

It is an arithmetic number, because the mean of its divisors is an integer number (278505).

2⁷⁴²⁶⁷⁸ is an apocalyptic number.

742678 is a deficient number, since it is larger than the sum of its proper divisors (371342).

742678 is a wasteful number, since it uses less digits than its factorization.

742678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371341.

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

The square root of 742678 is about 861.7876768671. The cubic root of 742678 is about 90.5593965163.

The spelling of 742678 in words is "seven hundred forty-two thousand, six hundred seventy-eight".