8451749 has 2 divisors, whose sum is σ = 8451750. Its totient is φ = 8451748.

The previous prime is 8451743. The next prime is 8451763. The reversal of 8451749 is 9471548.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7562500 + 889249 = 2750^2 + 943^2 .

It is a cyclic number.

It is not a de Polignac number, because 8451749 - 2¹² = 8447653 is a prime.

It is a super-2 number, since 2×8451749² = 142864122318002, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8451743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4225874 + 4225875.

It is an arithmetic number, because the mean of its divisors is an integer number (4225875).

Almost surely, 2^8451749 is an apocalyptic number.

It is an amenable number.

8451749 is a deficient number, since it is larger than the sum of its proper divisors (1).

8451749 is an equidigital number, since it uses as much as digits as its factorization.

8451749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 38.

The square root of 8451749 is about 2907.1891923299. The cubic root of 8451749 is about 203.6958574947.

The spelling of 8451749 in words is "eight million, four hundred fifty-one thousand, seven hundred forty-nine".