126551500 has 24 divisors (see below), whose sum is σ = 276389568. Its totient is φ = 50620400.

The previous prime is 126551479. The next prime is 126551501. The reversal of 126551500 is 5155621.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (126551501) 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 7 ways as a sum of consecutive naturals, for example, 126052 + ... + 127051.

It is an arithmetic number, because the mean of its divisors is an integer number (11516232).

Almost surely, 2^126551500 is an apocalyptic number.

126551500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

126551500 is an abundant number, since it is smaller than the sum of its proper divisors (149838068).

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

126551500 is a wasteful number, since it uses less digits than its factorization.

126551500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253122 (or 253110 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 126551500 is about 11249.5111004879. The cubic root of 126551500 is about 502.0601664366.

The spelling of 126551500 in words is "one hundred twenty-six million, five hundred fifty-one thousand, five hundred".