1391101 has 4 divisors (see below), whose sum is σ = 1439100. Its totient is φ = 1343104.

The previous prime is 1391087. The next prime is 1391113. The reversal of 1391101 is 1011931.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1011931 = 23 ⋅43997.

It can be written as a sum of positive squares in 2 ways, for example, as 902500 + 488601 = 950^2 + 699^2 .

It is a cyclic number.

It is not a de Polignac number, because 1391101 - 2¹⁵ = 1358333 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 (1391701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23956 + ... + 24013.

It is an arithmetic number, because the mean of its divisors is an integer number (359775).

2^1391101 is an apocalyptic number.

It is an amenable number.

1391101 is a deficient number, since it is larger than the sum of its proper divisors (47999).

1391101 is an equidigital number, since it uses as much as digits as its factorization.

1391101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47998.

The product of its (nonzero) digits is 27, while the sum is 16.

The square root of 1391101 is about 1179.4494478357. The cubic root of 1391101 is about 111.6313613296.

The spelling of 1391101 in words is "one million, three hundred ninety-one thousand, one hundred one".