1286513 has 2 divisors, whose sum is σ = 1286514. Its totient is φ = 1286512.

The previous prime is 1286503. The next prime is 1286521. The reversal of 1286513 is 3156821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1270129 + 16384 = 1127^2 + 128^2 .

It is a cyclic number.

It is not a de Polignac number, because 1286513 - 2¹² = 1282417 is a prime.

It is equal to p₉₉₀₇₁ and since 1286513 and 99071 have the same sum of digits, it is a Honaker prime.

It is a plaindrome in base 14.

It is not a weakly prime, because it can be changed into another prime (1286503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 643256 + 643257.

It is an arithmetic number, because the mean of its divisors is an integer number (643257).

2^1286513 is an apocalyptic number.

It is an amenable number.

1286513 is a deficient number, since it is larger than the sum of its proper divisors (1).

1286513 is an equidigital number, since it uses as much as digits as its factorization.

1286513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 26.

The square root of 1286513 is about 1134.2455642408. The cubic root of 1286513 is about 108.7605494676.

The spelling of 1286513 in words is "one million, two hundred eighty-six thousand, five hundred thirteen".