8125749 has 36 divisors (see below), whose sum is σ = 12897612. Its totient is φ = 4924800.

The previous prime is 8125729. The next prime is 8125757. The reversal of 8125749 is 9475218.

8125749 is a `hidden beast` number, since 81 + 2 + 574 + 9 = 666.

8125749 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 324900 + 7800849 = 570^2 + 2793^2 .

It is not a de Polignac number, because 8125749 - 2²¹ = 6028597 is a prime.

It is a super-2 number, since 2×8125749² = 132055593622002, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8125729) 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 35 ways as a sum of consecutive naturals, for example, 133179 + ... + 133239.

It is an arithmetic number, because the mean of its divisors is an integer number (358267).

Almost surely, 2^8125749 is an apocalyptic number.

It is an amenable number.

8125749 is a deficient number, since it is larger than the sum of its proper divisors (4771863).

8125749 is a wasteful number, since it uses less digits than its factorization.

8125749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146 (or 124 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 8125749 is about 2850.5699430114. The cubic root of 8125749 is about 201.0424652239.

It can be divided in two parts, 812 and 5749, that added together give a 8-th power (6561 = 3⁸).

The spelling of 8125749 in words is "eight million, one hundred twenty-five thousand, seven hundred forty-nine".