126405544 has 8 divisors (see below), whose sum is σ = 237010410. Its totient is φ = 63202768.

The previous prime is 126405533. The next prime is 126405547. The reversal of 126405544 is 445504621.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 83503044 + 42902500 = 9138^2 + 6550^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (126405547) 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 as a sum of consecutive naturals, namely, 7900339 + ... + 7900354.

Almost surely, 2^126405544 is an apocalyptic number.

It is an amenable number.

126405544 is a deficient number, since it is larger than the sum of its proper divisors (110604866).

126405544 is a wasteful number, since it uses less digits than its factorization.

126405544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15800699 (or 15800695 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 31.

The square root of 126405544 is about 11243.0220136759. The cubic root of 126405544 is about 501.8670780278.

The spelling of 126405544 in words is "one hundred twenty-six million, four hundred five thousand, five hundred forty-four".