1311556042 has 8 divisors (see below), whose sum is σ = 1973660832. Its totient is φ = 653669100.

The previous prime is 1311556039. The next prime is 1311556061. The reversal of 1311556042 is 2406551131.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1311556042.

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, 1053684 + ... + 1054927.

It is an arithmetic number, because the mean of its divisors is an integer number (246707604).

Almost surely, 2^1311556042 is an apocalyptic number.

1311556042 is a deficient number, since it is larger than the sum of its proper divisors (662104790).

1311556042 is a wasteful number, since it uses less digits than its factorization.

1311556042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2108924.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 1311556042 is about 36215.4116640968. The cubic root of 1311556042 is about 1094.6172406158.

The spelling of 1311556042 in words is "one billion, three hundred eleven million, five hundred fifty-six thousand, forty-two".