1240749 has 12 divisors (see below), whose sum is σ = 1813500. Its totient is φ = 817344.

The previous prime is 1240741. The next prime is 1240751. The reversal of 1240749 is 9470421.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 324900 + 915849 = 570^2 + 957^2 .

It is not a de Polignac number, because 1240749 - 2³ = 1240741 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240741) 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 11 ways as a sum of consecutive naturals, for example, 27 + ... + 1575.

It is an arithmetic number, because the mean of its divisors is an integer number (151125).

2^1240749 is an apocalyptic number.

It is an amenable number.

1240749 is a deficient number, since it is larger than the sum of its proper divisors (572751).

1240749 is a wasteful number, since it uses less digits than its factorization.

1240749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1644 (or 1641 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 1240749 is about 1113.8891327237. The cubic root of 1240749 is about 107.4553338866.

The spelling of 1240749 in words is "one million, two hundred forty thousand, seven hundred forty-nine".