1242315516 has 24 divisors (see below), whose sum is σ = 3121716304. Its totient is φ = 382250880.

The previous prime is 1242315499. The next prime is 1242315517. The reversal of 1242315516 is 6155132421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242315517) 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, 3981625 + ... + 3981936.

Almost surely, 2^1242315516 is an apocalyptic number.

It is an amenable number.

1242315516 is an abundant number, since it is smaller than the sum of its proper divisors (1879400788).

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

1242315516 is a wasteful number, since it uses less digits than its factorization.

1242315516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7963581 (or 7963579 counting only the distinct ones).

The product of its digits is 7200, while the sum is 30.

The square root of 1242315516 is about 35246.4965067452. The cubic root of 1242315516 is about 1075.0053768615.

Adding to 1242315516 its reverse (6155132421), we get a palindrome (7397447937).

The spelling of 1242315516 in words is "one billion, two hundred forty-two million, three hundred fifteen thousand, five hundred sixteen".