1242657416 has 96 divisors (see below), whose sum is σ = 3152291520. Its totient is φ = 446878080.

The previous prime is 1242657401. The next prime is 1242657421. The reversal of 1242657416 is 6147562421.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1242657416.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 81035 + ... + 95141.

It is an arithmetic number, because the mean of its divisors is an integer number (32836370).

Almost surely, 2^1242657416 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1242657416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1576145760).

1242657416 is an abundant number, since it is smaller than the sum of its proper divisors (1909634104).

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

1242657416 is a wasteful number, since it uses less digits than its factorization.

1242657416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14155 (or 14140 counting only the distinct ones).

The product of its digits is 80640, while the sum is 38.

The square root of 1242657416 is about 35251.3463005316. The cubic root of 1242657416 is about 1075.1039859028.

The spelling of 1242657416 in words is "one billion, two hundred forty-two million, six hundred fifty-seven thousand, four hundred sixteen".