1318657542 has 8 divisors (see below), whose sum is σ = 2637315096. Its totient is φ = 439552512.

The previous prime is 1318657537. The next prime is 1318657573. The reversal of 1318657542 is 2457568131.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

1318657542 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 1318657494 and 1318657503.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109888123 + ... + 109888134.

It is an arithmetic number, because the mean of its divisors is an integer number (329664387).

Almost surely, 2^1318657542 is an apocalyptic number.

1318657542 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1318657542 is a wasteful number, since it uses less digits than its factorization.

1318657542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219776262.

The product of its digits is 201600, while the sum is 42.

The square root of 1318657542 is about 36313.3245792781. The cubic root of 1318657542 is about 1096.5893094775.

The spelling of 1318657542 in words is "one billion, three hundred eighteen million, six hundred fifty-seven thousand, five hundred forty-two".