126067721 has 8 divisors (see below), whose sum is σ = 137035584. Its totient is φ = 115281360.

The previous prime is 126067651. The next prime is 126067723. The reversal of 126067721 is 127760621.

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 126067721 - 2¹⁴ = 126051337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126067723) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 43925 + ... + 46706.

It is an arithmetic number, because the mean of its divisors is an integer number (17129448).

Almost surely, 2^126067721 is an apocalyptic number.

It is an amenable number.

126067721 is a deficient number, since it is larger than the sum of its proper divisors (10967863).

126067721 is a wasteful number, since it uses less digits than its factorization.

126067721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90751.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 126067721 is about 11227.9882882019. The cubic root of 126067721 is about 501.4195936931.

The spelling of 126067721 in words is "one hundred twenty-six million, sixty-seven thousand, seven hundred twenty-one".