1234240305 has 16 divisors (see below), whose sum is σ = 1999783680. Its totient is φ = 649928448.

The previous prime is 1234240303. The next prime is 1234240363. The reversal of 1234240305 is 5030424321.

It is not a de Polignac number, because 1234240305 - 2¹ = 1234240303 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1234240303) 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 15 ways as a sum of consecutive naturals, for example, 519592 + ... + 521961.

It is an arithmetic number, because the mean of its divisors is an integer number (124986480).

Almost surely, 2^1234240305 is an apocalyptic number.

1234240305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1234240305 is a deficient number, since it is larger than the sum of its proper divisors (765543375).

1234240305 is a wasteful number, since it uses less digits than its factorization.

1234240305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1041640.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 1234240305 is about 35131.7563608767. The cubic root of 1234240305 is about 1072.6710872950.

Adding to 1234240305 its reverse (5030424321), we get a palindrome (6264664626).

The spelling of 1234240305 in words is "one billion, two hundred thirty-four million, two hundred forty thousand, three hundred five".