1291485 has 32 divisors (see below), whose sum is σ = 2298240. Its totient is φ = 615168.

The previous prime is 1291483. The next prime is 1291489. The reversal of 1291485 is 5841921.

It is a happy number.

It is not a de Polignac number, because 1291485 - 2¹ = 1291483 is a prime.

It is a super-3 number, since 3×1291485³ = 6462333308986527375, which contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1291481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7126 + ... + 7304.

It is an arithmetic number, because the mean of its divisors is an integer number (71820).

2^1291485 is an apocalyptic number.

1291485 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1291485 is a deficient number, since it is larger than the sum of its proper divisors (1006755).

1291485 is a wasteful number, since it uses less digits than its factorization.

1291485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237.

The product of its digits is 2880, while the sum is 30.

The square root of 1291485 is about 1136.4352159274. The cubic root of 1291485 is about 108.9004786976.

The spelling of 1291485 in words is "one million, two hundred ninety-one thousand, four hundred eighty-five".