1291401 has 6 divisors (see below), whose sum is σ = 1865370. Its totient is φ = 860928.

The previous prime is 1291391. The next prime is 1291421. The reversal of 1291401 is 1041921.

It can be written as a sum of positive squares in only one way, i.e., 1040400 + 251001 = 1020^2 + 501^2 .

It is not a de Polignac number, because 1291401 - 2⁵ = 1291369 is a prime.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (1291421) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 71736 + ... + 71753.

It is an arithmetic number, because the mean of its divisors is an integer number (310895).

2^1291401 is an apocalyptic number.

It is an amenable number.

1291401 is a deficient number, since it is larger than the sum of its proper divisors (573969).

1291401 is a wasteful number, since it uses less digits than its factorization.

1291401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143495 (or 143492 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 1291401 is about 1136.3982576544. The cubic root of 1291401 is about 108.8981176330.

The spelling of 1291401 in words is "one million, two hundred ninety-one thousand, four hundred one".