421242606397 has 2 divisors, whose sum is σ = 421242606398. Its totient is φ = 421242606396.

The previous prime is 421242606391. The next prime is 421242606403. The reversal of 421242606397 is 793606242124.

It is a balanced prime because it is at equal distance from previous prime (421242606391) and next prime (421242606403).

It can be written as a sum of positive squares in only one way, i.e., 401969948121 + 19272658276 = 634011^2 + 138826^2 .

It is a cyclic number.

It is not a de Polignac number, because 421242606397 - 2³¹ = 419095122749 is a prime.

It is a super-4 number, since 4×421242606397⁴ (a number of 48 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421242606391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210621303198 + 210621303199.

It is an arithmetic number, because the mean of its divisors is an integer number (210621303199).

Almost surely, 2^421242606397 is an apocalyptic number.

It is an amenable number.

421242606397 is a deficient number, since it is larger than the sum of its proper divisors (1).

421242606397 is an equidigital number, since it uses as much as digits as its factorization.

421242606397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 870912, while the sum is 46.

The spelling of 421242606397 in words is "four hundred twenty-one billion, two hundred forty-two million, six hundred six thousand, three hundred ninety-seven".