1139668245 has 32 divisors (see below), whose sum is σ = 2095948800. Its totient is φ = 586861632.

The previous prime is 1139668237. The next prime is 1139668247. The reversal of 1139668245 is 5428669311.

1139668245 is a `hidden beast` number, since 11 + 396 + 6 + 8 + 245 = 666.

It is not a de Polignac number, because 1139668245 - 2³ = 1139668237 is a prime.

It is a super-2 number, since 2×1139668245² = 2597687417322760050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1139668245.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1139668247) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 141637 + ... + 149466.

It is an arithmetic number, because the mean of its divisors is an integer number (65498400).

Almost surely, 2^1139668245 is an apocalyptic number.

1139668245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1139668245 is a deficient number, since it is larger than the sum of its proper divisors (956280555).

1139668245 is a wasteful number, since it uses less digits than its factorization.

1139668245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291146 (or 291140 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 1139668245 is about 33758.9728072404. The cubic root of 1139668245 is about 1044.5425819481.

The spelling of 1139668245 in words is "one billion, one hundred thirty-nine million, six hundred sixty-eight thousand, two hundred forty-five".