126650138 has 4 divisors (see below), whose sum is σ = 189975210. Its totient is φ = 63325068.

The previous prime is 126650137. The next prime is 126650171. The reversal of 126650138 is 831056621.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 117787609 + 8862529 = 10853^2 + 2977^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (126650137) 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, 31662533 + ... + 31662536.

Almost surely, 2^126650138 is an apocalyptic number.

126650138 is a deficient number, since it is larger than the sum of its proper divisors (63325072).

126650138 is an equidigital number, since it uses as much as digits as its factorization.

126650138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63325071.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 126650138 is about 11253.8943481801. The cubic root of 126650138 is about 502.1905727663.

The spelling of 126650138 in words is "one hundred twenty-six million, six hundred fifty thousand, one hundred thirty-eight".