1242320356 has 24 divisors (see below), whose sum is σ = 2350930176. Its totient is φ = 572181120.

The previous prime is 1242320341. The next prime is 1242320363. The reversal of 1242320356 is 6530232421.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191160 + ... + 197551.

It is an arithmetic number, because the mean of its divisors is an integer number (97955424).

Almost surely, 2^1242320356 is an apocalyptic number.

It is an amenable number.

1242320356 is a deficient number, since it is larger than the sum of its proper divisors (1108609820).

1242320356 is a wasteful number, since it uses less digits than its factorization.

1242320356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388779 (or 388777 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 1242320356 is about 35246.5651659846. The cubic root of 1242320356 is about 1075.0067729157.

Adding to 1242320356 its reverse (6530232421), we get a palindrome (7772552777).

It can be divided in two parts, 1242320 and 356, that added together give a triangular number (1242676 = T₁₅₇₆).

The spelling of 1242320356 in words is "one billion, two hundred forty-two million, three hundred twenty thousand, three hundred fifty-six".