1285913 has 2 divisors, whose sum is σ = 1285914. Its totient is φ = 1285912.

The previous prime is 1285903. The next prime is 1285937. The reversal of 1285913 is 3195821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1281424 + 4489 = 1132^2 + 67^2 .

It is a cyclic number.

It is not a de Polignac number, because 1285913 - 2¹⁰ = 1284889 is a prime.

It is a super-3 number, since 3×1285913³ = 6379050133333630491, which contains 333 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a plaindrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1285903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 642956 + 642957.

It is an arithmetic number, because the mean of its divisors is an integer number (642957).

2^1285913 is an apocalyptic number.

It is an amenable number.

1285913 is a deficient number, since it is larger than the sum of its proper divisors (1).

1285913 is an equidigital number, since it uses as much as digits as its factorization.

1285913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 29.

The square root of 1285913 is about 1133.9810404059. The cubic root of 1285913 is about 108.7436390343.

The spelling of 1285913 in words is "one million, two hundred eighty-five thousand, nine hundred thirteen".