123581742 has 16 divisors (see below), whose sum is σ = 252912000. Its totient is φ = 40235832.

The previous prime is 123581723. The next prime is 123581747. The reversal of 123581742 is 247185321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123581747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 239242 + ... + 239757.

It is an arithmetic number, because the mean of its divisors is an integer number (15807000).

Almost surely, 2^123581742 is an apocalyptic number.

123581742 is an abundant number, since it is smaller than the sum of its proper divisors (129330258).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123581742 is a wasteful number, since it uses less digits than its factorization.

123581742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479047.

The product of its digits is 13440, while the sum is 33.

The square root of 123581742 is about 11116.7325235431. The cubic root of 123581742 is about 498.1017920661.

The spelling of 123581742 in words is "one hundred twenty-three million, five hundred eighty-one thousand, seven hundred forty-two".