1142401 has 4 divisors (see below), whose sum is σ = 1230292. Its totient is φ = 1054512.

The previous prime is 1142389. The next prime is 1142423. The reversal of 1142401 is 1042411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1042411 = 499 ⋅2089.

It can be written as a sum of positive squares in 2 ways, for example, as 540225 + 602176 = 735^2 + 776^2 .

It is a cyclic number.

It is not a de Polignac number, because 1142401 - 2¹¹ = 1140353 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 87877 = 1142401 / (1 + 1 + 4 + 2 + 4 + 0 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1142431) 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, 43926 + ... + 43951.

It is an arithmetic number, because the mean of its divisors is an integer number (307573).

2^1142401 is an apocalyptic number.

It is an amenable number.

1142401 is a deficient number, since it is larger than the sum of its proper divisors (87891).

1142401 is an equidigital number, since it uses as much as digits as its factorization.

1142401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87890.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 1142401 is about 1068.8316050716. The cubic root of 1142401 is about 104.5376801459.

Adding to 1142401 its reverse (1042411), we get a palindrome (2184812).

The spelling of 1142401 in words is "one million, one hundred forty-two thousand, four hundred one".