126820154 has 4 divisors (see below), whose sum is σ = 190230234. Its totient is φ = 63410076.

The previous prime is 126820151. The next prime is 126820171. The reversal of 126820154 is 451028621.

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., 94614529 + 32205625 = 9727^2 + 5675^2 .

It is not an unprimeable number, because it can be changed into a prime (126820151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31705037 + ... + 31705040.

Almost surely, 2^126820154 is an apocalyptic number.

126820154 is a deficient number, since it is larger than the sum of its proper divisors (63410080).

126820154 is an equidigital number, since it uses as much as digits as its factorization.

126820154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63410079.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 126820154 is about 11261.4454667241. The cubic root of 126820154 is about 502.4151869598.

Adding to 126820154 its reverse (451028621), we get a palindrome (577848775).

The spelling of 126820154 in words is "one hundred twenty-six million, eight hundred twenty thousand, one hundred fifty-four".