1139668 has 6 divisors (see below), whose sum is σ = 1994426. Its totient is φ = 569832.

The previous prime is 1139623. The next prime is 1139669. The reversal of 1139668 is 8669311.

It can be written as a sum of positive squares in only one way, i.e., 956484 + 183184 = 978^2 + 428^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1139669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142455 + ... + 142462.

2^1139668 is an apocalyptic number.

It is an amenable number.

1139668 is a deficient number, since it is larger than the sum of its proper divisors (854758).

1139668 is a wasteful number, since it uses less digits than its factorization.

1139668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284921 (or 284919 counting only the distinct ones).

The product of its digits is 7776, while the sum is 34.

The square root of 1139668 is about 1067.5523406372. The cubic root of 1139668 is about 104.4542507098.

The spelling of 1139668 in words is "one million, one hundred thirty-nine thousand, six hundred sixty-eight".