1291252 has 18 divisors (see below), whose sum is σ = 2402582. Its totient is φ = 607104.

The previous prime is 1291249. The next prime is 1291271. The reversal of 1291252 is 2521921.

It can be written as a sum of positive squares in 3 ways, for example, as 197136 + 1094116 = 444^2 + 1046^2 .

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 598 + ... + 1714.

2^1291252 is an apocalyptic number.

It is an amenable number.

1291252 is a deficient number, since it is larger than the sum of its proper divisors (1111330).

1291252 is a wasteful number, since it uses less digits than its factorization.

1291252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1155 (or 1136 counting only the distinct ones).

The product of its digits is 360, while the sum is 22.

The square root of 1291252 is about 1136.3326977607. The cubic root of 1291252 is about 108.8939293022.

The spelling of 1291252 in words is "one million, two hundred ninety-one thousand, two hundred fifty-two".