1261144 has 16 divisors (see below), whose sum is σ = 2489400. Its totient is φ = 597312.

The previous prime is 1261133. The next prime is 1261157. The reversal of 1261144 is 4411621.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3997 + ... + 4300.

2^1261144 is an apocalyptic number.

It is an amenable number.

1261144 is a deficient number, since it is larger than the sum of its proper divisors (1228256).

1261144 is a wasteful number, since it uses less digits than its factorization.

1261144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8322 (or 8318 counting only the distinct ones).

The product of its digits is 192, while the sum is 19.

The square root of 1261144 is about 1123.0066785198. The cubic root of 1261144 is about 108.0409081426.

Adding to 1261144 its reverse (4411621), we get a palindrome (5672765).

The spelling of 1261144 in words is "one million, two hundred sixty-one thousand, one hundred forty-four".