1236401 has 4 divisors (see below), whose sum is σ = 1253412. Its totient is φ = 1219392.

The previous prime is 1236397. The next prime is 1236419. The reversal of 1236401 is 1046321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1046321 = 491 ⋅2131.

It can be written as a sum of positive squares in 2 ways, for example, as 564001 + 672400 = 751^2 + 820^2 .

It is not a de Polignac number, because 1236401 - 2² = 1236397 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1236401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1236481) 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, 8396 + ... + 8541.

It is an arithmetic number, because the mean of its divisors is an integer number (313353).

2^1236401 is an apocalyptic number.

It is an amenable number.

1236401 is a deficient number, since it is larger than the sum of its proper divisors (17011).

1236401 is an equidigital number, since it uses as much as digits as its factorization.

1236401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17010.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1236401 is about 1111.9356995798. The cubic root of 1236401 is about 107.3296671544.

The spelling of 1236401 in words is "one million, two hundred thirty-six thousand, four hundred one".