77421441 has 8 divisors (see below), whose sum is σ = 103582080. Its totient is φ = 51437552.

The previous prime is 77421437. The next prime is 77421467. The reversal of 77421441 is 14412477.

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 77421441 - 2² = 77421437 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77421399 and 77421408.

It is not an unprimeable number, because it can be changed into a prime (77421431) 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, 43161 + ... + 44918.

It is an arithmetic number, because the mean of its divisors is an integer number (12947760).

Almost surely, 2^77421441 is an apocalyptic number.

It is an amenable number.

77421441 is a deficient number, since it is larger than the sum of its proper divisors (26160639).

77421441 is a wasteful number, since it uses less digits than its factorization.

77421441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88375.

The product of its digits is 6272, while the sum is 30.

The square root of 77421441 is about 8798.9454481773. The cubic root of 77421441 is about 426.2068415180.

The spelling of 77421441 in words is "seventy-seven million, four hundred twenty-one thousand, four hundred forty-one".