1212565441 has 2 divisors, whose sum is σ = 1212565442. Its totient is φ = 1212565440.

The previous prime is 1212565439. The next prime is 1212565483. The reversal of 1212565441 is 1445652121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1156000000 + 56565441 = 34000^2 + 7521^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212565441 - 2¹ = 1212565439 is a prime.

Together with 1212565439, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1212565411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606282720 + 606282721.

It is an arithmetic number, because the mean of its divisors is an integer number (606282721).

Almost surely, 2^1212565441 is an apocalyptic number.

It is an amenable number.

1212565441 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212565441 is an equidigital number, since it uses as much as digits as its factorization.

1212565441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9600, while the sum is 31.

The square root of 1212565441 is about 34821.9103582787. The cubic root of 1212565441 is about 1066.3548014818.

The spelling of 1212565441 in words is "one billion, two hundred twelve million, five hundred sixty-five thousand, four hundred forty-one".