865722141 has 8 divisors (see below), whose sum is σ = 1282551360. Its totient is φ = 577148076.

The previous prime is 865722133. The next prime is 865722149. The reversal of 865722141 is 141227568.

865722141 is a `hidden beast` number, since 86 + 572 + 2 + 1 + 4 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (865722133) and next prime (865722149).

It is not a de Polignac number, because 865722141 - 2³ = 865722133 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 865722096 and 865722105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865722149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16031865 + ... + 16031918.

It is an arithmetic number, because the mean of its divisors is an integer number (160318920).

Almost surely, 2^865722141 is an apocalyptic number.

It is an amenable number.

865722141 is a deficient number, since it is larger than the sum of its proper divisors (416829219).

865722141 is a wasteful number, since it uses less digits than its factorization.

865722141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32063792 (or 32063786 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 865722141 is about 29423.1565437837. The cubic root of 865722141 is about 953.0730187127.

The spelling of 865722141 in words is "eight hundred sixty-five million, seven hundred twenty-two thousand, one hundred forty-one".