126956550 has 144 divisors (see below), whose sum is σ = 382689792. Its totient is φ = 27720000.

The previous prime is 126956539. The next prime is 126956567. The reversal of 126956550 is 55659621.

It is a super-2 number, since 2×126956550² = 32235931175805000, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 126956499 and 126956508.

It is a congruent number.

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 71 ways as a sum of consecutive naturals, for example, 168675 + ... + 169425.

It is an arithmetic number, because the mean of its divisors is an integer number (2657568).

Almost surely, 2^126956550 is an apocalyptic number.

126956550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 126956550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (191344896).

126956550 is an abundant number, since it is smaller than the sum of its proper divisors (255733242).

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

126956550 is a wasteful number, since it uses less digits than its factorization.

126956550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 803 (or 791 counting only the distinct ones).

The product of its (nonzero) digits is 81000, while the sum is 39.

The square root of 126956550 is about 11267.4997226536. The cubic root of 126956550 is about 502.5952394911.

The spelling of 126956550 in words is "one hundred twenty-six million, nine hundred fifty-six thousand, five hundred fifty".