1287656451149 has 2 divisors, whose sum is σ = 1287656451150. Its totient is φ = 1287656451148.

The previous prime is 1287656451119. The next prime is 1287656451181. The reversal of 1287656451149 is 9411546567821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1218043322500 + 69613128649 = 1103650^2 + 263843^2 .

It is an emirp because it is prime and its reverse (9411546567821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1287656451149 - 2²⁴ = 1287639673933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1287656451119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 643828225574 + 643828225575.

It is an arithmetic number, because the mean of its divisors is an integer number (643828225575).

Almost surely, 2^{1287656451149} is an apocalyptic number.

It is an amenable number.

1287656451149 is a deficient number, since it is larger than the sum of its proper divisors (1).

1287656451149 is an equidigital number, since it uses as much as digits as its factorization.

1287656451149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14515200, while the sum is 59.

The spelling of 1287656451149 in words is "one trillion, two hundred eighty-seven billion, six hundred fifty-six million, four hundred fifty-one thousand, one hundred forty-nine".