126138004 has 6 divisors (see below), whose sum is σ = 220741514. Its totient is φ = 63069000.

The previous prime is 126137993. The next prime is 126138007. The reversal of 126138004 is 400831621.

It can be written as a sum of positive squares in only one way, i.e., 115562500 + 10575504 = 10750^2 + 3252^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 126138004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126138007) 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, 15767247 + ... + 15767254.

Almost surely, 2^126138004 is an apocalyptic number.

It is an amenable number.

126138004 is a deficient number, since it is larger than the sum of its proper divisors (94603510).

126138004 is a wasteful number, since it uses less digits than its factorization.

126138004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31534505 (or 31534503 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 126138004 is about 11231.1176647741. The cubic root of 126138004 is about 501.5127571823.

Adding to 126138004 its reverse (400831621), we get a palindrome (526969625).

The spelling of 126138004 in words is "one hundred twenty-six million, one hundred thirty-eight thousand, four".