1240023403 has 8 divisors (see below), whose sum is σ = 1309529088. Its totient is φ = 1171817064.

The previous prime is 1240023373. The next prime is 1240023409. The reversal of 1240023403 is 3043200421.

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

It is not a de Polignac number, because 1240023403 - 2⁵ = 1240023371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1240023409) 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, 322875 + ... + 326692.

It is an arithmetic number, because the mean of its divisors is an integer number (163691136).

Almost surely, 2^1240023403 is an apocalyptic number.

1240023403 is a deficient number, since it is larger than the sum of its proper divisors (69505685).

1240023403 is an equidigital number, since it uses as much as digits as its factorization.

1240023403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649673.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 1240023403 is about 35213.9660220203. The cubic root of 1240023403 is about 1074.3438297396.

Adding to 1240023403 its reverse (3043200421), we get a palindrome (4283223824).

The spelling of 1240023403 in words is "one billion, two hundred forty million, twenty-three thousand, four hundred three".