126065551 has 8 divisors (see below), whose sum is σ = 135787520. Its totient is φ = 116652312.

The previous prime is 126065519. The next prime is 126065579. The reversal of 126065551 is 155560621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 126065551 - 2⁵ = 126065519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126065351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76335 + ... + 77968.

It is an arithmetic number, because the mean of its divisors is an integer number (16973440).

Almost surely, 2^126065551 is an apocalyptic number.

126065551 is a deficient number, since it is larger than the sum of its proper divisors (9721969).

126065551 is a wasteful number, since it uses less digits than its factorization.

126065551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154365.

The product of its (nonzero) digits is 9000, while the sum is 31.

The square root of 126065551 is about 11227.8916542688. The cubic root of 126065551 is about 501.4167167029.

The spelling of 126065551 in words is "one hundred twenty-six million, sixty-five thousand, five hundred fifty-one".