1391338745 has 32 divisors (see below), whose sum is σ = 1856532480. Its totient is φ = 996649920.

The previous prime is 1391338723. The next prime is 1391338801. The reversal of 1391338745 is 5478331931.

It is not a de Polignac number, because 1391338745 - 2⁶ = 1391338681 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1391338696 and 1391338705.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 121142 + ... + 132128.

It is an arithmetic number, because the mean of its divisors is an integer number (58016640).

Almost surely, 2^1391338745 is an apocalyptic number.

It is an amenable number.

1391338745 is a deficient number, since it is larger than the sum of its proper divisors (465193735).

1391338745 is a wasteful number, since it uses less digits than its factorization.

1391338745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11085.

The product of its digits is 272160, while the sum is 44.

The square root of 1391338745 is about 37300.6534125074. The cubic root of 1391338745 is about 1116.3772039006.

The spelling of 1391338745 in words is "one billion, three hundred ninety-one million, three hundred thirty-eight thousand, seven hundred forty-five".