1311691542 has 32 divisors (see below), whose sum is σ = 3174515712. Its totient is φ = 352723584.

The previous prime is 1311691531. The next prime is 1311691571. The reversal of 1311691542 is 2451961131.

1311691542 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 917838 + ... + 919265.

It is an arithmetic number, because the mean of its divisors is an integer number (99203616).

Almost surely, 2^1311691542 is an apocalyptic number.

1311691542 is an abundant number, since it is smaller than the sum of its proper divisors (1862824170).

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

1311691542 is a wasteful number, since it uses less digits than its factorization.

1311691542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1837132.

The product of its digits is 6480, while the sum is 33.

The square root of 1311691542 is about 36217.2823662958. The cubic root of 1311691542 is about 1094.6549351618.

The spelling of 1311691542 in words is "one billion, three hundred eleven million, six hundred ninety-one thousand, five hundred forty-two".