1242313520 has 80 divisors (see below), whose sum is σ = 3318055488. Its totient is φ = 423736320.

The previous prime is 1242313511. The next prime is 1242313529. The reversal of 1242313520 is 253132421.

It is an interprime number because it is at equal distance from previous prime (1242313511) and next prime (1242313529).

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (1242313529) 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, 104690 + ... + 115950.

Almost surely, 2^1242313520 is an apocalyptic number.

1242313520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1242313520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1659027744).

1242313520 is an abundant number, since it is smaller than the sum of its proper divisors (2075741968).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1242313520 is a wasteful number, since it uses less digits than its factorization.

1242313520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11478 (or 11472 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 1242313520 is about 35246.4681918629. The cubic root of 1242313520 is about 1075.0048011323.

Adding to 1242313520 its reverse (253132421), we get a palindrome (1495445941).

The spelling of 1242313520 in words is "one billion, two hundred forty-two million, three hundred thirteen thousand, five hundred twenty".