742681 has 2 divisors, whose sum is σ = 742682. Its totient is φ = 742680.

The previous prime is 742673. The next prime is 742697. The reversal of 742681 is 186247.

742681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 549081 + 193600 = 741^2 + 440^2 .

It is an emirp because it is prime and its reverse (186247) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 742681 - 2³ = 742673 is a prime.

It is a super-2 number, since 2×742681² = 1103150135522, which contains 22 as substring.

742681 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (742381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 371340 + 371341.

It is an arithmetic number, because the mean of its divisors is an integer number (371341).

2⁷⁴²⁶⁸¹ is an apocalyptic number.

It is an amenable number.

742681 is a deficient number, since it is larger than the sum of its proper divisors (1).

742681 is an equidigital number, since it uses as much as digits as its factorization.

742681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2688, while the sum is 28.

The square root of 742681 is about 861.7894174333. The cubic root of 742681 is about 90.5595184524.

The spelling of 742681 in words is "seven hundred forty-two thousand, six hundred eighty-one".