1284499901 has 2 divisors, whose sum is σ = 1284499902. Its totient is φ = 1284499900.

The previous prime is 1284499877. The next prime is 1284499903. The reversal of 1284499901 is 1099944821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 812307001 + 472192900 = 28501^2 + 21730^2 .

It is a cyclic number.

It is not a de Polignac number, because 1284499901 - 2¹⁴ = 1284483517 is a prime.

It is a Sophie Germain prime.

Together with 1284499903, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1284499903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 642249950 + 642249951.

It is an arithmetic number, because the mean of its divisors is an integer number (642249951).

Almost surely, 2^1284499901 is an apocalyptic number.

It is an amenable number.

1284499901 is a deficient number, since it is larger than the sum of its proper divisors (1).

1284499901 is an equidigital number, since it uses as much as digits as its factorization.

1284499901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 186624, while the sum is 47.

The square root of 1284499901 is about 35839.9204937734. The cubic root of 1284499901 is about 1087.0379138000.

The spelling of 1284499901 in words is "one billion, two hundred eighty-four million, four hundred ninety-nine thousand, nine hundred one".