126515051 has 4 divisors (see below), whose sum is σ = 136246992. Its totient is φ = 116783112.

The previous prime is 126515047. The next prime is 126515069. The reversal of 126515051 is 150515621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 126515051 - 2² = 126515047 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 126515051.

It is not an unprimeable number, because it can be changed into a prime (126515021) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 4865951 + ... + 4865976.

It is an arithmetic number, because the mean of its divisors is an integer number (34061748).

Almost surely, 2^126515051 is an apocalyptic number.

126515051 is a deficient number, since it is larger than the sum of its proper divisors (9731941).

126515051 is an equidigital number, since it uses as much as digits as its factorization.

126515051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9731940.

The product of its (nonzero) digits is 1500, while the sum is 26.

The square root of 126515051 is about 11247.8909578641. The cubic root of 126515051 is about 502.0119611653.

The spelling of 126515051 in words is "one hundred twenty-six million, five hundred fifteen thousand, fifty-one".