742890681 has 24 divisors (see below), whose sum is σ = 1161451200. Its totient is φ = 454851936.

The previous prime is 742890637. The next prime is 742890683. The reversal of 742890681 is 186098247.

It is not a de Polignac number, because 742890681 - 2⁷ = 742890553 is a prime.

It is a super-2 number, since 2×742890681² = 1103773127833287522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (742890683) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7330 + ... + 39236.

It is an arithmetic number, because the mean of its divisors is an integer number (48393800).

Almost surely, 2^742890681 is an apocalyptic number.

It is an amenable number.

742890681 is a deficient number, since it is larger than the sum of its proper divisors (418560519).

742890681 is a wasteful number, since it uses less digits than its factorization.

742890681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32125 (or 32122 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 742890681 is about 27256.0210045414. The cubic root of 742890681 is about 905.6804020163.

The spelling of 742890681 in words is "seven hundred forty-two million, eight hundred ninety thousand, six hundred eighty-one".