1400289 has 8 divisors (see below), whose sum is σ = 2036832. Its totient is φ = 848640.

The previous prime is 1400279. The next prime is 1400297. The reversal of 1400289 is 9820041.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1400289 - 2⁹ = 1399777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1400249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21184 + ... + 21249.

It is an arithmetic number, because the mean of its divisors is an integer number (254604).

2^1400289 is an apocalyptic number.

It is an amenable number.

1400289 is a deficient number, since it is larger than the sum of its proper divisors (636543).

1400289 is a wasteful number, since it uses less digits than its factorization.

1400289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42447.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 1400289 is about 1183.3380751079. The cubic root of 1400289 is about 111.8765913239.

The spelling of 1400289 in words is "one million, four hundred thousand, two hundred eighty-nine".