1391382051 has 16 divisors (see below), whose sum is σ = 1965772800. Its totient is φ = 872371328.

The previous prime is 1391382019. The next prime is 1391382067. The reversal of 1391382051 is 1502831931.

It is a cyclic number.

It is not a de Polignac number, because 1391382051 - 2⁵ = 1391382019 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1391382011) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 63910 + ... + 82868.

It is an arithmetic number, because the mean of its divisors is an integer number (122860800).

Almost surely, 2^1391382051 is an apocalyptic number.

1391382051 is a deficient number, since it is larger than the sum of its proper divisors (574390749).

1391382051 is a wasteful number, since it uses less digits than its factorization.

1391382051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20418.

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

The square root of 1391382051 is about 37301.2339072047. The cubic root of 1391382051 is about 1116.3887863494.

The spelling of 1391382051 in words is "one billion, three hundred ninety-one million, three hundred eighty-two thousand, fifty-one".