865225749 has 8 divisors (see below), whose sum is σ = 1154514240. Its totient is φ = 576377216.

The previous prime is 865225733. The next prime is 865225763. The reversal of 865225749 is 947522568.

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 865225749 - 2⁴ = 865225733 is a prime.

It is a super-2 number, since 2×865225749² = 1497231193465222002, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 865225698 and 865225707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865225349) 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, 105372 + ... + 113285.

It is an arithmetic number, because the mean of its divisors is an integer number (144314280).

Almost surely, 2^865225749 is an apocalyptic number.

It is an amenable number.

865225749 is a deficient number, since it is larger than the sum of its proper divisors (289288491).

865225749 is a wasteful number, since it uses less digits than its factorization.

865225749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219979.

The product of its digits is 1209600, while the sum is 48.

The square root of 865225749 is about 29414.7199374735. The cubic root of 865225749 is about 952.8908246612.

The spelling of 865225749 in words is "eight hundred sixty-five million, two hundred twenty-five thousand, seven hundred forty-nine".