1201409 has 6 divisors (see below), whose sum is σ = 1320690. Its totient is φ = 1092080.

The previous prime is 1201381. The next prime is 1201439. The reversal of 1201409 is 9041021.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 874225 + 327184 = 935^2 + 572^2 .

It is not a de Polignac number, because 1201409 - 2⁸ = 1201153 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1201439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4844 + ... + 5085.

It is an arithmetic number, because the mean of its divisors is an integer number (220115).

2^1201409 is an apocalyptic number.

It is an amenable number.

1201409 is a deficient number, since it is larger than the sum of its proper divisors (119281).

1201409 is an equidigital number, since it uses as much as digits as its factorization.

1201409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9951 (or 9940 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 1201409 is about 1096.0880439089. The cubic root of 1201409 is about 106.3074319262.

The spelling of 1201409 in words is "one million, two hundred one thousand, four hundred nine".