1240513 has 4 divisors (see below), whose sum is σ = 1243348. Its totient is φ = 1237680.

The previous prime is 1240511. The next prime is 1240517. The reversal of 1240513 is 3150421.

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 425104 + 815409 = 652^2 + 903^2 .

It is a cyclic number.

It is not a de Polignac number, because 1240513 - 2¹ = 1240511 is a prime.

It is a Duffinian number.

1240513 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1240511) by changing a digit.

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, 606 + ... + 1687.

It is an arithmetic number, because the mean of its divisors is an integer number (310837).

2^1240513 is an apocalyptic number.

It is an amenable number.

1240513 is a deficient number, since it is larger than the sum of its proper divisors (2835).

1240513 is an equidigital number, since it uses as much as digits as its factorization.

1240513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2834.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 1240513 is about 1113.7831925469. The cubic root of 1240513 is about 107.4485205110.

Adding to 1240513 its reverse (3150421), we get a palindrome (4390934).

The spelling of 1240513 in words is "one million, two hundred forty thousand, five hundred thirteen".