1212528617 has 2 divisors, whose sum is σ = 1212528618. Its totient is φ = 1212528616.

The previous prime is 1212528589. The next prime is 1212528619. The reversal of 1212528617 is 7168252121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 798853696 + 413674921 = 28264^2 + 20339^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212528617 - 2¹⁶ = 1212463081 is a prime.

It is a super-3 number, since 3×1212528617³ (a number of 28 digits) contains 333 as substring.

Together with 1212528619, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1212528619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606264308 + 606264309.

It is an arithmetic number, because the mean of its divisors is an integer number (606264309).

Almost surely, 2^1212528617 is an apocalyptic number.

It is an amenable number.

1212528617 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212528617 is an equidigital number, since it uses as much as digits as its factorization.

1212528617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13440, while the sum is 35.

The square root of 1212528617 is about 34821.3816067083. The cubic root of 1212528617 is about 1066.3440067801.

The spelling of 1212528617 in words is "one billion, two hundred twelve million, five hundred twenty-eight thousand, six hundred seventeen".