126553138 has 4 divisors (see below), whose sum is σ = 189829710. Its totient is φ = 63276568.

The previous prime is 126553111. The next prime is 126553157. The reversal of 126553138 is 831355621.

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., 114211969 + 12341169 = 10687^2 + 3513^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31638283 + ... + 31638286.

Almost surely, 2^126553138 is an apocalyptic number.

126553138 is a deficient number, since it is larger than the sum of its proper divisors (63276572).

126553138 is an equidigital number, since it uses as much as digits as its factorization.

126553138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63276571.

The product of its digits is 21600, while the sum is 34.

The square root of 126553138 is about 11249.5839034162. The cubic root of 126553138 is about 502.0623325403.

The spelling of 126553138 in words is "one hundred twenty-six million, five hundred fifty-three thousand, one hundred thirty-eight".