• 742 can be written using four 4's:

See also 113.

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742 has 8 divisors (see below), whose sum is σ = 1296. Its totient is φ = 312.

The previous prime is 739. The next prime is 743. The reversal of 742 is 247.

742 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

742 is an esthetic number in base 4 and base 6, because in such bases its adjacent digits differ by 1.

It is a sphenic number, since it is the product of 3 distinct primes.

742 is a repfigit number.

It is a pancake number, because a pancake can be divided into 742 parts by 38 straight cuts.

742 is strictly pandigital in base 5.

It is a plaindrome in base 8 and base 15.

It is a nialpdrome in base 7 and base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (743) 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, 13 + ... + 40.

It is an arithmetic number, because the mean of its divisors is an integer number (162).

742 is the 14-th decagonal number.

742 is a deficient number, since it is larger than the sum of its proper divisors (554).

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

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

The sum of its prime factors is 62.

The product of its digits is 56, while the sum is 13.

The square root of 742 is about 27.2396769438. The cubic root of 742 is about 9.0531830526.

Subtracting from 742 its sum of digits (13), we obtain a 6-th power (729 = 3⁶).

Subtracting from 742 its product of digits (56), we obtain a palindrome (686).

Adding to 742 its reverse (247), we get a palindrome (989).

It can be divided in two parts, 7 and 42, that added together give a square (49 = 7²).

The spelling of 742 in words is "seven hundred forty-two", and thus it is an aban number and an iban number.