1139551 has 8 divisors (see below), whose sum is σ = 1311264. Its totient is φ = 970080.

The previous prime is 1139549. The next prime is 1139557. The reversal of 1139551 is 1559311.

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 1139551 - 2¹ = 1139549 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 (1139557) 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, 741 + ... + 1681.

It is an arithmetic number, because the mean of its divisors is an integer number (163908).

2^1139551 is an apocalyptic number.

1139551 is a deficient number, since it is larger than the sum of its proper divisors (171713).

1139551 is an equidigital number, since it uses as much as digits as its factorization.

1139551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1121.

The product of its digits is 675, while the sum is 25.

The square root of 1139551 is about 1067.4975409808. The cubic root of 1139551 is about 104.4506761116.

The spelling of 1139551 in words is "one million, one hundred thirty-nine thousand, five hundred fifty-one".