1240783 has 8 divisors (see below), whose sum is σ = 1297296. Its totient is φ = 1185600.

The previous prime is 1240777. The next prime is 1240793. The reversal of 1240783 is 3870421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1240783 - 2⁵ = 1240751 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240703) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1888 + ... + 2458.

It is an arithmetic number, because the mean of its divisors is an integer number (162162).

2^1240783 is an apocalyptic number.

1240783 is a deficient number, since it is larger than the sum of its proper divisors (56513).

1240783 is an equidigital number, since it uses as much as digits as its factorization.

1240783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 1240783 is about 1113.9043944612. The cubic root of 1240783 is about 107.4563154034.

The spelling of 1240783 in words is "one million, two hundred forty thousand, seven hundred eighty-three".