1285969 has 2 divisors, whose sum is σ = 1285970. Its totient is φ = 1285968.

The previous prime is 1285943. The next prime is 1285981. The reversal of 1285969 is 9695821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 846400 + 439569 = 920^2 + 663^2 .

It is a cyclic number.

It is not a de Polignac number, because 1285969 - 2⁵ = 1285937 is a prime.

It is a super-2 number, since 2×1285969² = 3307432537922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1285069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 642984 + 642985.

It is an arithmetic number, because the mean of its divisors is an integer number (642985).

2^1285969 is an apocalyptic number.

It is an amenable number.

1285969 is a deficient number, since it is larger than the sum of its proper divisors (1).

1285969 is an equidigital number, since it uses as much as digits as its factorization.

1285969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 40.

The square root of 1285969 is about 1134.0057319079. The cubic root of 1285969 is about 108.7452175639.

The spelling of 1285969 in words is "one million, two hundred eighty-five thousand, nine hundred sixty-nine".