771421 has 8 divisors (see below), whose sum is σ = 887744. Its totient is φ = 656640.

The previous prime is 771403. The next prime is 771427. The reversal of 771421 is 124177.

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 771421 - 2⁵ = 771389 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 771392 and 771401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (771427) 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, 1066 + ... + 1636.

It is an arithmetic number, because the mean of its divisors is an integer number (110968).

2⁷⁷¹⁴²¹ is an apocalyptic number.

It is an amenable number.

771421 is a deficient number, since it is larger than the sum of its proper divisors (116323).

771421 is a wasteful number, since it uses less digits than its factorization.

771421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771.

The product of its digits is 392, while the sum is 22.

The square root of 771421 is about 878.3057554178. The cubic root of 771421 is about 91.7129125695.

Adding to 771421 its reverse (124177), we get a palindrome (895598).

The spelling of 771421 in words is "seven hundred seventy-one thousand, four hundred twenty-one", and thus it is an iban number.