771142321 has 8 divisors (see below), whose sum is σ = 852004224. Its totient is φ = 694224960.

The previous prime is 771142249. The next prime is 771142327. The reversal of 771142321 is 123241177.

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 771142321 - 2⁷ = 771142193 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 771142321.

It is not an unprimeable number, because it can be changed into a prime (771142327) 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, 985725 + ... + 986506.

It is an arithmetic number, because the mean of its divisors is an integer number (106500528).

Almost surely, 2^771142321 is an apocalyptic number.

It is an amenable number.

771142321 is a deficient number, since it is larger than the sum of its proper divisors (80861903).

771142321 is a wasteful number, since it uses less digits than its factorization.

771142321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1972271.

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

The square root of 771142321 is about 27769.4494183806. The cubic root of 771142321 is about 917.0186735073.

Adding to 771142321 its reverse (123241177), we get a palindrome (894383498).

The spelling of 771142321 in words is "seven hundred seventy-one million, one hundred forty-two thousand, three hundred twenty-one".