1240450913 has 8 divisors (see below), whose sum is σ = 1336292328. Its totient is φ = 1144669824.

The previous prime is 1240450909. The next prime is 1240450933. The reversal of 1240450913 is 3190540421.

It can be written as a sum of positive squares in 4 ways, for example, as 7879249 + 1232571664 = 2807^2 + 35108^2 .

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 1240450913 - 2² = 1240450909 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1240450933) 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, 33431 + ... + 59987.

It is an arithmetic number, because the mean of its divisors is an integer number (167036541).

Almost surely, 2^1240450913 is an apocalyptic number.

1240450913 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1240450913 is a deficient number, since it is larger than the sum of its proper divisors (95841415).

1240450913 is a wasteful number, since it uses less digits than its factorization.

1240450913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30163.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 1240450913 is about 35220.0356757343. The cubic root of 1240450913 is about 1074.4672790115.

The spelling of 1240450913 in words is "one billion, two hundred forty million, four hundred fifty thousand, nine hundred thirteen".