1212728453 has 2 divisors, whose sum is σ = 1212728454. Its totient is φ = 1212728452.

The previous prime is 1212728393. The next prime is 1212728479. The reversal of 1212728453 is 3548272121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1035359329 + 177369124 = 32177^2 + 13318^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212728453 - 2¹⁶ = 1212662917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212728953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606364226 + 606364227.

It is an arithmetic number, because the mean of its divisors is an integer number (606364227).

Almost surely, 2^1212728453 is an apocalyptic number.

It is an amenable number.

1212728453 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212728453 is an equidigital number, since it uses as much as digits as its factorization.

1212728453 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26880, while the sum is 35.

The square root of 1212728453 is about 34824.2509323603. The cubic root of 1212728453 is about 1066.4025847008.

The spelling of 1212728453 in words is "one billion, two hundred twelve million, seven hundred twenty-eight thousand, four hundred fifty-three".