1139021 has 8 divisors (see below), whose sum is σ = 1257144. Its totient is φ = 1025280.

The previous prime is 1139011. The next prime is 1139041. The reversal of 1139021 is 1209311.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 148996 + 990025 = 386^2 + 995^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1139021 - 2⁶ = 1138957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1139011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 536 + ... + 1601.

It is an arithmetic number, because the mean of its divisors is an integer number (157143).

2^1139021 is an apocalyptic number.

It is an amenable number.

1139021 is a deficient number, since it is larger than the sum of its proper divisors (118123).

1139021 is a wasteful number, since it uses less digits than its factorization.

1139021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2191.

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 1139021 is about 1067.2492679782. The cubic root of 1139021 is about 104.4344804220.

It can be divided in two parts, 11390 and 21, that added together give a palindrome (11411).

The spelling of 1139021 in words is "one million, one hundred thirty-nine thousand, twenty-one".