1291149 has 6 divisors (see below), whose sum is σ = 1865006. Its totient is φ = 860760.

The previous prime is 1291139. The next prime is 1291153. The reversal of 1291149 is 9411921.

It can be written as a sum of positive squares in only one way, i.e., 1232100 + 59049 = 1110^2 + 243^2 .

It is not a de Polignac number, because 1291149 - 2⁵ = 1291117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1291139) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 71722 + ... + 71739.

2^1291149 is an apocalyptic number.

It is an amenable number.

1291149 is a deficient number, since it is larger than the sum of its proper divisors (573857).

1291149 is a wasteful number, since it uses less digits than its factorization.

1291149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143467 (or 143464 counting only the distinct ones).

The product of its digits is 648, while the sum is 27.

The square root of 1291149 is about 1136.2873756229. The cubic root of 1291149 is about 108.8910338248.

The spelling of 1291149 in words is "one million, two hundred ninety-one thousand, one hundred forty-nine".