126489649 has 24 divisors (see below), whose sum is σ = 151455080. Its totient is φ = 104924160.

The previous prime is 126489637. The next prime is 126489653. The reversal of 126489649 is 946984621.

It can be written as a sum of positive squares in 4 ways, for example, as 5489649 + 121000000 = 2343^2 + 11000^2 .

It is a de Polignac number, because none of the positive numbers 2^k-126489649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126489659) 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 in 23 ways as a sum of consecutive naturals, for example, 152167 + ... + 152995.

Almost surely, 2^126489649 is an apocalyptic number.

It is an amenable number.

126489649 is a deficient number, since it is larger than the sum of its proper divisors (24965431).

126489649 is a wasteful number, since it uses less digits than its factorization.

126489649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 961 (or 950 counting only the distinct ones).

The product of its digits is 746496, while the sum is 49.

The square root of 126489649 is about 11246.7617117106. The cubic root of 126489649 is about 501.9783605218.

The spelling of 126489649 in words is "one hundred twenty-six million, four hundred eighty-nine thousand, six hundred forty-nine".