1139391645 has 16 divisors (see below), whose sum is σ = 2083459200. Its totient is φ = 520864704.

The previous prime is 1139391637. The next prime is 1139391647. The reversal of 1139391645 is 5461939311.

It is not a de Polignac number, because 1139391645 - 2³ = 1139391637 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1139391597 and 1139391606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1139391647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5425570 + ... + 5425779.

It is an arithmetic number, because the mean of its divisors is an integer number (130216200).

Almost surely, 2^1139391645 is an apocalyptic number.

1139391645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1139391645 is a deficient number, since it is larger than the sum of its proper divisors (944067555).

1139391645 is a wasteful number, since it uses less digits than its factorization.

1139391645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10851364.

The product of its digits is 87480, while the sum is 42.

The square root of 1139391645 is about 33754.8758700132. The cubic root of 1139391645 is about 1044.4580708469.

The spelling of 1139391645 in words is "one billion, one hundred thirty-nine million, three hundred ninety-one thousand, six hundred forty-five".