1291286 has 16 divisors (see below), whose sum is σ = 2072304. Its totient is φ = 601344.

The previous prime is 1291271. The next prime is 1291313. The reversal of 1291286 is 6821921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5426 + ... + 5658.

It is an arithmetic number, because the mean of its divisors is an integer number (129519).

2^1291286 is an apocalyptic number.

1291286 is a deficient number, since it is larger than the sum of its proper divisors (781018).

1291286 is a wasteful number, since it uses less digits than its factorization.

1291286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415.

The product of its digits is 1728, while the sum is 29.

The square root of 1291286 is about 1136.3476580695. The cubic root of 1291286 is about 108.8948850571.

The spelling of 1291286 in words is "one million, two hundred ninety-one thousand, two hundred eighty-six".