742181057 has 8 divisors (see below), whose sum is σ = 768829320. Its totient is φ = 715939840.

The previous prime is 742180993. The next prime is 742181071. The reversal of 742181057 is 750181247.

It can be written as a sum of positive squares in 4 ways, for example, as 23726641 + 718454416 = 4871^2 + 26804^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 742181057 - 2⁶ = 742180993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (742181357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98048 + ... + 105345.

It is an arithmetic number, because the mean of its divisors is an integer number (96103665).

Almost surely, 2^742181057 is an apocalyptic number.

It is an amenable number.

742181057 is a deficient number, since it is larger than the sum of its proper divisors (26648263).

742181057 is a wasteful number, since it uses less digits than its factorization.

742181057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203523.

The product of its (nonzero) digits is 15680, while the sum is 35.

The square root of 742181057 is about 27243.0001468267. Note that the first 3 decimals coincide. The cubic root of 742181057 is about 905.3919354840.

The spelling of 742181057 in words is "seven hundred forty-two million, one hundred eighty-one thousand, fifty-seven".