742806381 has 16 divisors (see below), whose sum is σ = 1073058624. Its totient is φ = 455234304.

The previous prime is 742806373. The next prime is 742806397. The reversal of 742806381 is 183608247.

742806381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 742806381 - 2³ = 742806373 is a prime.

It is a super-2 number, since 2×742806381² = 1103522639308634322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (742886381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 167166 + ... + 171551.

It is an arithmetic number, because the mean of its divisors is an integer number (67066164).

Almost surely, 2^742806381 is an apocalyptic number.

It is an amenable number.

742806381 is a deficient number, since it is larger than the sum of its proper divisors (330252243).

742806381 is a wasteful number, since it uses less digits than its factorization.

742806381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338780.

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 742806381 is about 27254.4745133712. The cubic root of 742806381 is about 905.6461431641.

The spelling of 742806381 in words is "seven hundred forty-two million, eight hundred six thousand, three hundred eighty-one".