1138641 has 16 divisors (see below), whose sum is σ = 1766400. Its totient is φ = 638928.

The previous prime is 1138639. The next prime is 1138649. The reversal of 1138641 is 1468311.

It is not a de Polignac number, because 1138641 - 2¹ = 1138639 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1138649) 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, 780 + ... + 1698.

It is an arithmetic number, because the mean of its divisors is an integer number (110400).

2^1138641 is an apocalyptic number.

It is an amenable number.

1138641 is a deficient number, since it is larger than the sum of its proper divisors (627759).

1138641 is an equidigital number, since it uses as much as digits as its factorization.

1138641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 988.

The product of its digits is 576, while the sum is 24.

The square root of 1138641 is about 1067.0712253641. The cubic root of 1138641 is about 104.4228653254.

The spelling of 1138641 in words is "one million, one hundred thirty-eight thousand, six hundred forty-one".