1285291 has 8 divisors (see below), whose sum is σ = 1516544. Its totient is φ = 1065960.

The previous prime is 1285289. The next prime is 1285301. The reversal of 1285291 is 1925821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1285291 - 2¹ = 1285289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1285231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2745 + ... + 3178.

It is an arithmetic number, because the mean of its divisors is an integer number (189568).

2^1285291 is an apocalyptic number.

1285291 is a deficient number, since it is larger than the sum of its proper divisors (231253).

1285291 is an equidigital number, since it uses as much as digits as its factorization.

1285291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5961.

The product of its digits is 1440, while the sum is 28.

The square root of 1285291 is about 1133.7067522071. The cubic root of 1285291 is about 108.7261029978.

The spelling of 1285291 in words is "one million, two hundred eighty-five thousand, two hundred ninety-one".