771421321 has 8 divisors (see below), whose sum is σ = 842078304. Its totient is φ = 700852320.

The previous prime is 771421303. The next prime is 771421331. The reversal of 771421321 is 123124177.

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 771421321 - 2¹⁷ = 771290249 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 771421321.

It is not an unprimeable number, because it can be changed into a prime (771421331) 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, 2935 + ... + 39388.

It is an arithmetic number, because the mean of its divisors is an integer number (105259788).

Almost surely, 2^771421321 is an apocalyptic number.

It is an amenable number.

771421321 is a deficient number, since it is larger than the sum of its proper divisors (70656983).

771421321 is a wasteful number, since it uses less digits than its factorization.

771421321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43991.

The product of its digits is 2352, while the sum is 28.

The square root of 771421321 is about 27774.4724702378. The cubic root of 771421321 is about 917.1292529053.

Adding to 771421321 its reverse (123124177), we get a palindrome (894545498).

The spelling of 771421321 in words is "seven hundred seventy-one million, four hundred twenty-one thousand, three hundred twenty-one".