1400111 has 4 divisors (see below), whose sum is σ = 1402632. Its totient is φ = 1397592.

The previous prime is 1400107. The next prime is 1400131. The reversal of 1400111 is 1110041.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1400111 - 2² = 1400107 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1400131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20 + ... + 1673.

It is an arithmetic number, because the mean of its divisors is an integer number (350658).

2^1400111 is an apocalyptic number.

1400111 is a deficient number, since it is larger than the sum of its proper divisors (2521).

1400111 is an equidigital number, since it uses as much as digits as its factorization.

1400111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2520.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 1400111 is about 1183.2628617514. The cubic root of 1400111 is about 111.8718506651.

Adding to 1400111 its reverse (1110041), we get a palindrome (2510152).

The spelling of 1400111 in words is "one million, four hundred thousand, one hundred eleven".