1240745 has 16 divisors (see below), whose sum is σ = 1721088.
Its totient is φ = 848640.
The previous prime is 1240741. The next prime is 1240751. The reversal of 1240745 is 5470421.
It is not a de Polignac number, because 1240745 - 22 = 1240741 is a prime.
It is a Duffinian number.
It is a Curzon number.
It is a self number, because there is not a number n which added to its sum of digits gives 1240745.
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 polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 272 + ... + 1598.
It is an arithmetic number, because the mean of its divisors is an integer number (107568).
21240745 is an apocalyptic number.
It is an amenable number.
1240745 is a deficient number, since it is larger than the sum of its proper divisors (480343).
1240745 is a wasteful number, since it uses less digits than its factorization.
1240745 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1360.
The product of its (nonzero) digits is 1120, while the sum is 23.
The square root of 1240745 is about 1113.8873372114.
The cubic root of 1240745 is about 107.4552184129.
The spelling of 1240745 in words is "one million, two hundred forty thousand, seven hundred forty-five".