126440625 has 24 divisors (see below), whose sum is σ = 210736512. Its totient is φ = 67430000.

The previous prime is 126440621. The next prime is 126440641. The reversal of 126440625 is 526044621.

It is not a de Polignac number, because 126440625 - 2² = 126440621 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 126440592 and 126440601.

It is not an unprimeable number, because it can be changed into a prime (126440621) 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 23 ways as a sum of consecutive naturals, for example, 2632 + ... + 16118.

It is an arithmetic number, because the mean of its divisors is an integer number (8780688).

Almost surely, 2^126440625 is an apocalyptic number.

126440625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

126440625 is a deficient number, since it is larger than the sum of its proper divisors (84295887).

126440625 is an frugal number, since it uses more digits than its factorization.

126440625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13515 (or 13495 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 126440625 is about 11244.5820286928. The cubic root of 126440625 is about 501.9135010194.

The spelling of 126440625 in words is "one hundred twenty-six million, four hundred forty thousand, six hundred twenty-five".