742112681 has 2 divisors, whose sum is σ = 742112682. Its totient is φ = 742112680.

The previous prime is 742112677. The next prime is 742112719. The reversal of 742112681 is 186211247.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 687278656 + 54834025 = 26216^2 + 7405^2 .

It is a cyclic number.

It is not a de Polignac number, because 742112681 - 2² = 742112677 is a prime.

It is a super-2 number, since 2×742112681² = 1101462462602015522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (742112381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 371056340 + 371056341.

It is an arithmetic number, because the mean of its divisors is an integer number (371056341).

Almost surely, 2^742112681 is an apocalyptic number.

It is an amenable number.

742112681 is a deficient number, since it is larger than the sum of its proper divisors (1).

742112681 is an equidigital number, since it uses as much as digits as its factorization.

742112681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5376, while the sum is 32.

The square root of 742112681 is about 27241.7451900571. The cubic root of 742112681 is about 905.3641305076.

It can be divided in two parts, 7421 and 12681, that added together give a palindrome (20102).

The spelling of 742112681 in words is "seven hundred forty-two million, one hundred twelve thousand, six hundred eighty-one".