126400530 has 32 divisors (see below), whose sum is σ = 303811200. Its totient is φ = 33656832.

The previous prime is 126400523. The next prime is 126400541. The reversal of 126400530 is 35004621.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 126400497 and 126400506.

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 15 ways as a sum of consecutive naturals, for example, 20331 + ... + 25809.

It is an arithmetic number, because the mean of its divisors is an integer number (9494100).

Almost surely, 2^126400530 is an apocalyptic number.

126400530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

126400530 is an abundant number, since it is smaller than the sum of its proper divisors (177410670).

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

126400530 is a wasteful number, since it uses less digits than its factorization.

126400530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6258.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 126400530 is about 11242.7990287117. The cubic root of 126400530 is about 501.8604422566.

The spelling of 126400530 in words is "one hundred twenty-six million, four hundred thousand, five hundred thirty".