1240445 has 4 divisors (see below), whose sum is σ = 1488540. Its totient is φ = 992352.

The previous prime is 1240423. The next prime is 1240483. The reversal of 1240445 is 5440421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 683929 + 556516 = 827^2 + 746^2 .

It is a cyclic number.

It is not a de Polignac number, because 1240445 - 2¹⁰ = 1239421 is a prime.

It is a plaindrome in base 13.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124040 + ... + 124049.

It is an arithmetic number, because the mean of its divisors is an integer number (372135).

2^1240445 is an apocalyptic number.

It is an amenable number.

1240445 is a deficient number, since it is larger than the sum of its proper divisors (248095).

1240445 is an equidigital number, since it uses as much as digits as its factorization.

1240445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248094.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 1240445 is about 1113.7526655411. The cubic root of 1240445 is about 107.4465571747.

Adding to 1240445 its reverse (5440421), we get a palindrome (6680866).

The spelling of 1240445 in words is "one million, two hundred forty thousand, four hundred forty-five".