8521262149 has 2 divisors, whose sum is σ = 8521262150. Its totient is φ = 8521262148.

The previous prime is 8521262119. The next prime is 8521262159. The reversal of 8521262149 is 9412621258.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8428525249 + 92736900 = 91807^2 + 9630^2 .

It is a cyclic number.

It is not a de Polignac number, because 8521262149 - 2⁷ = 8521262021 is a prime.

It is a super-2 number, since 2×8521262149² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8521262119) 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 as a sum of consecutive naturals, namely, 4260631074 + 4260631075.

It is an arithmetic number, because the mean of its divisors is an integer number (4260631075).

Almost surely, 2^8521262149 is an apocalyptic number.

It is an amenable number.

8521262149 is a deficient number, since it is larger than the sum of its proper divisors (1).

8521262149 is an equidigital number, since it uses as much as digits as its factorization.

8521262149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69120, while the sum is 40.

The square root of 8521262149 is about 92310.6827458231. The cubic root of 8521262149 is about 2042.5277960049.

The spelling of 8521262149 in words is "eight billion, five hundred twenty-one million, two hundred sixty-two thousand, one hundred forty-nine".