126881604 has 54 divisors (see below), whose sum is σ = 325970190. Its totient is φ = 41608512.

The previous prime is 126881581. The next prime is 126881611. The reversal of 126881604 is 406188621.

It can be written as a sum of positive squares in only one way, i.e., 91240704 + 35640900 = 9552^2 + 5970^2 .

It is a super-2 number, since 2×126881604² = 32197882867225632, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 637497 + ... + 637695.

It is an arithmetic number, because the mean of its divisors is an integer number (6036485).

Almost surely, 2^126881604 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 126881604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162985095).

126881604 is an abundant number, since it is smaller than the sum of its proper divisors (199088586).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

126881604 is a wasteful number, since it uses less digits than its factorization.

126881604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497 (or 293 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 126881604 is about 11264.1734716756. The cubic root of 126881604 is about 502.4963213513.

The spelling of 126881604 in words is "one hundred twenty-six million, eight hundred eighty-one thousand, six hundred four".