1284884257 has 2 divisors, whose sum is σ = 1284884258. Its totient is φ = 1284884256.

The previous prime is 1284884233. The next prime is 1284884387. The reversal of 1284884257 is 7524884821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1281353616 + 3530641 = 35796^2 + 1879^2 .

It is a cyclic number.

It is not a de Polignac number, because 1284884257 - 2⁷ = 1284884129 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1284884257.

It is not a weakly prime, because it can be changed into another prime (1284854257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 642442128 + 642442129.

It is an arithmetic number, because the mean of its divisors is an integer number (642442129).

Almost surely, 2^1284884257 is an apocalyptic number.

It is an amenable number.

1284884257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1284884257 is an equidigital number, since it uses as much as digits as its factorization.

1284884257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1146880, while the sum is 49.

The square root of 1284884257 is about 35845.2822139818. The cubic root of 1284884257 is about 1087.1463263887.

The spelling of 1284884257 in words is "one billion, two hundred eighty-four million, eight hundred eighty-four thousand, two hundred fifty-seven".