126550000 has 60 divisors (see below), whose sum is σ = 306589752. Its totient is φ = 50600000.

The previous prime is 126549949. The next prime is 126550009. The reversal of 126550000 is 55621.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 126550000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126550009) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48735 + ... + 51265.

Almost surely, 2^126550000 is an apocalyptic number.

126550000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 126550000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153294876).

126550000 is an abundant number, since it is smaller than the sum of its proper divisors (180039752).

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

126550000 is an frugal number, since it uses more digits than its factorization.

126550000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2564 (or 2538 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 126550000 is about 11249.4444307263. Note that the first 4 decimals coincide. The cubic root of 126550000 is about 502.0581828088.

The spelling of 126550000 in words is "one hundred twenty-six million, five hundred fifty thousand".