126978229 has 8 divisors (see below), whose sum is σ = 145229120. Its totient is φ = 108755136.

The previous prime is 126978227. The next prime is 126978233. The reversal of 126978229 is 922879621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 126978229 - 2¹ = 126978227 is a prime.

It is a super-2 number, since 2×126978229² = 32246941279952882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126978221) 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 in 7 ways as a sum of consecutive naturals, for example, 3997 + ... + 16429.

It is an arithmetic number, because the mean of its divisors is an integer number (18153640).

Almost surely, 2^126978229 is an apocalyptic number.

It is an amenable number.

126978229 is a deficient number, since it is larger than the sum of its proper divisors (18250891).

126978229 is a wasteful number, since it uses less digits than its factorization.

126978229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13899.

The product of its digits is 217728, while the sum is 46.

The square root of 126978229 is about 11268.4616962565. The cubic root of 126978229 is about 502.6238454514.

The spelling of 126978229 in words is "one hundred twenty-six million, nine hundred seventy-eight thousand, two hundred twenty-nine".