861235742 has 8 divisors (see below), whose sum is σ = 1367845056. Its totient is φ = 405287392.

The previous prime is 861235741. The next prime is 861235747. The reversal of 861235742 is 247532168.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 861235696 and 861235705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861235741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12665198 + ... + 12665265.

It is an arithmetic number, because the mean of its divisors is an integer number (170980632).

Almost surely, 2^861235742 is an apocalyptic number.

861235742 is a deficient number, since it is larger than the sum of its proper divisors (506609314).

861235742 is a wasteful number, since it uses less digits than its factorization.

861235742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25330482.

The product of its digits is 80640, while the sum is 38.

The square root of 861235742 is about 29346.8182602476. The cubic root of 861235742 is about 951.4238084972.

The spelling of 861235742 in words is "eight hundred sixty-one million, two hundred thirty-five thousand, seven hundred forty-two".