765574421 has 2 divisors, whose sum is σ = 765574422. Its totient is φ = 765574420.

The previous prime is 765574417. The next prime is 765574441. The reversal of 765574421 is 124475567.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 744689521 + 20884900 = 27289^2 + 4570^2 .

It is a cyclic number.

It is not a de Polignac number, because 765574421 - 2² = 765574417 is a prime.

It is a super-4 number, since 4×765574421⁴ (a number of 37 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (765574441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 382787210 + 382787211.

It is an arithmetic number, because the mean of its divisors is an integer number (382787211).

Almost surely, 2^765574421 is an apocalyptic number.

It is an amenable number.

765574421 is a deficient number, since it is larger than the sum of its proper divisors (1).

765574421 is an equidigital number, since it uses as much as digits as its factorization.

765574421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 235200, while the sum is 41.

The square root of 765574421 is about 27669.0155408536. The cubic root of 765574421 is about 914.8062818623.

The spelling of 765574421 in words is "seven hundred sixty-five million, five hundred seventy-four thousand, four hundred twenty-one".