705127421 has 2 divisors, whose sum is σ = 705127422. Its totient is φ = 705127420.

The previous prime is 705127403. The next prime is 705127429. The reversal of 705127421 is 124721507.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 360468196 + 344659225 = 18986^2 + 18565^2 .

It is a cyclic number.

It is not a de Polignac number, because 705127421 - 2¹⁰ = 705126397 is a prime.

It is a super-2 number, since 2×705127421² = 994409359692222482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (705127429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 352563710 + 352563711.

It is an arithmetic number, because the mean of its divisors is an integer number (352563711).

Almost surely, 2^705127421 is an apocalyptic number.

It is an amenable number.

705127421 is a deficient number, since it is larger than the sum of its proper divisors (1).

705127421 is an equidigital number, since it uses as much as digits as its factorization.

705127421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3920, while the sum is 29.

The square root of 705127421 is about 26554.2354625397. The cubic root of 705127421 is about 890.0666620943.

Adding to 705127421 its reverse (124721507), we get a palindrome (829848928).

The spelling of 705127421 in words is "seven hundred five million, one hundred twenty-seven thousand, four hundred twenty-one".