1261844 has 6 divisors (see below), whose sum is σ = 2208234. Its totient is φ = 630920.

The previous prime is 1261837. The next prime is 1261861. The reversal of 1261844 is 4481621.

It can be written as a sum of positive squares in only one way, i.e., 925444 + 336400 = 962^2 + 580^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157727 + ... + 157734.

It is an arithmetic number, because the mean of its divisors is an integer number (368039).

2^1261844 is an apocalyptic number.

It is an amenable number.

1261844 is a deficient number, since it is larger than the sum of its proper divisors (946390).

1261844 is a wasteful number, since it uses less digits than its factorization.

1261844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315465 (or 315463 counting only the distinct ones).

The product of its digits is 1536, while the sum is 26.

The square root of 1261844 is about 1123.3182986135. The cubic root of 1261844 is about 108.0608938718.

The spelling of 1261844 in words is "one million, two hundred sixty-one thousand, eight hundred forty-four".