1290986 has 4 divisors (see below), whose sum is σ = 1936482. Its totient is φ = 645492.

The previous prime is 1290983. The next prime is 1291001. The reversal of 1290986 is 6890921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6890921 = 167 ⋅41263.

It can be written as a sum of positive squares in only one way, i.e., 1142761 + 148225 = 1069^2 + 385^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1290983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322745 + ... + 322748.

2^1290986 is an apocalyptic number.

1290986 is a deficient number, since it is larger than the sum of its proper divisors (645496).

1290986 is an equidigital number, since it uses as much as digits as its factorization.

1290986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645495.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 1290986 is about 1136.2156485456. The cubic root of 1290986 is about 108.8864513469.

The spelling of 1290986 in words is "one million, two hundred ninety thousand, nine hundred eighty-six".