126021136 has 20 divisors (see below), whose sum is σ = 258529212. Its totient is φ = 59303936.

The previous prime is 126021101. The next prime is 126021143. The reversal of 126021136 is 631120621.

It can be written as a sum of positive squares in 2 ways, for example, as 71910400 + 54110736 = 8480^2 + 7356^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 231385 + ... + 231928.

Almost surely, 2^126021136 is an apocalyptic number.

126021136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

126021136 is an abundant number, since it is smaller than the sum of its proper divisors (132508076).

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

126021136 is a wasteful number, since it uses less digits than its factorization.

126021136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463338 (or 463332 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 126021136 is about 11225.9135931113. The cubic root of 126021136 is about 501.3578239570.

Adding to 126021136 its reverse (631120621), we get a palindrome (757141757).

The spelling of 126021136 in words is "one hundred twenty-six million, twenty-one thousand, one hundred thirty-six".