76126721 has 8 divisors (see below), whose sum is σ = 83702784. Its totient is φ = 68659920.

The previous prime is 76126703. The next prime is 76126733. The reversal of 76126721 is 12762167.

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 76126721 - 2¹⁸ = 75864577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (76126751) 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, 25850 + ... + 28643.

It is an arithmetic number, because the mean of its divisors is an integer number (10462848).

Almost surely, 2^76126721 is an apocalyptic number.

It is an amenable number.

76126721 is a deficient number, since it is larger than the sum of its proper divisors (7576063).

76126721 is a wasteful number, since it uses less digits than its factorization.

76126721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54631.

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

The square root of 76126721 is about 8725.0628077969. The cubic root of 76126721 is about 423.8176521730.

Adding to 76126721 its reverse (12762167), we get a palindrome (88888888).

The spelling of 76126721 in words is "seventy-six million, one hundred twenty-six thousand, seven hundred twenty-one".