1401811 has 2 divisors, whose sum is σ = 1401812. Its totient is φ = 1401810.

The previous prime is 1401809. The next prime is 1401817. The reversal of 1401811 is 1181041.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1401811 - 2¹ = 1401809 is a prime.

Together with 1401809, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1401817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700905 + 700906.

It is an arithmetic number, because the mean of its divisors is an integer number (700906).

2^1401811 is an apocalyptic number.

1401811 is a deficient number, since it is larger than the sum of its proper divisors (1).

1401811 is an equidigital number, since it uses as much as digits as its factorization.

1401811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 16.

The square root of 1401811 is about 1183.9809964691. The cubic root of 1401811 is about 111.9171102256.

Adding to 1401811 its reverse (1181041), we get a palindrome (2582852).

The spelling of 1401811 in words is "one million, four hundred one thousand, eight hundred eleven".