1240243213 has 8 divisors (see below), whose sum is σ = 1368195840. Its totient is φ = 1114824480.

The previous prime is 1240243171. The next prime is 1240243217. The reversal of 1240243213 is 3123420421.

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

It is not a de Polignac number, because 1240243213 - 2¹³ = 1240235021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240243217) 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, 632445 + ... + 634402.

It is an arithmetic number, because the mean of its divisors is an integer number (171024480).

Almost surely, 2^1240243213 is an apocalyptic number.

It is an amenable number.

1240243213 is a deficient number, since it is larger than the sum of its proper divisors (127952627).

1240243213 is a wasteful number, since it uses less digits than its factorization.

1240243213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1266947.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 1240243213 is about 35217.0869465378. The cubic root of 1240243213 is about 1074.4073063816.

Adding to 1240243213 its reverse (3123420421), we get a palindrome (4363663634).

The spelling of 1240243213 in words is "one billion, two hundred forty million, two hundred forty-three thousand, two hundred thirteen".