1243331357 has 4 divisors (see below), whose sum is σ = 1244538336. Its totient is φ = 1242124380.

The previous prime is 1243331321. The next prime is 1243331423. The reversal of 1243331357 is 7531333421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1243331357 is a prime.

It is a super-2 number, since 2×1243331357² = 3091745726598922898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243331317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 601943 + ... + 604004.

It is an arithmetic number, because the mean of its divisors is an integer number (311134584).

Almost surely, 2^1243331357 is an apocalyptic number.

It is an amenable number.

1243331357 is a deficient number, since it is larger than the sum of its proper divisors (1206979).

1243331357 is a wasteful number, since it uses less digits than its factorization.

1243331357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1206978.

The product of its digits is 22680, while the sum is 32.

The square root of 1243331357 is about 35260.9040865375. The cubic root of 1243331357 is about 1075.2983075505.

Adding to 1243331357 its reverse (7531333421), we get a palindrome (8774664778).

The spelling of 1243331357 in words is "one billion, two hundred forty-three million, three hundred thirty-one thousand, three hundred fifty-seven".