126205550 has 24 divisors (see below), whose sum is σ = 235124832. Its totient is φ = 50400000.

The previous prime is 126205529. The next prime is 126205571. The reversal of 126205550 is 55502621.

It is an interprime number because it is at equal distance from previous prime (126205529) and next prime (126205571).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35870 + ... + 39230.

It is an arithmetic number, because the mean of its divisors is an integer number (9796868).

Almost surely, 2^126205550 is an apocalyptic number.

126205550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

126205550 is a deficient number, since it is larger than the sum of its proper divisors (108919282).

126205550 is a wasteful number, since it uses less digits than its factorization.

126205550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4124 (or 4119 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 126205550 is about 11234.1243539494. The cubic root of 126205550 is about 501.6022600410.

The spelling of 126205550 in words is "one hundred twenty-six million, two hundred five thousand, five hundred fifty".