1400287 has 4 divisors (see below), whose sum is σ = 1600336. Its totient is φ = 1200240.

The previous prime is 1400279. The next prime is 1400297. The reversal of 1400287 is 7820041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7820041 = 613 ⋅12757.

It is a cyclic number.

It is not a de Polignac number, because 1400287 - 2³ = 1400279 is a prime.

It is an Ulam number.

It is a Duffinian number.

1400287 is a modest number, since divided by 287 gives 14 as remainder.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1400297) 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, 100014 + ... + 100027.

It is an arithmetic number, because the mean of its divisors is an integer number (400084).

2^1400287 is an apocalyptic number.

1400287 is a deficient number, since it is larger than the sum of its proper divisors (200049).

1400287 is an equidigital number, since it uses as much as digits as its factorization.

1400287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200048.

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 1400287 is about 1183.3372300405. The cubic root of 1400287 is about 111.8765380603.

The spelling of 1400287 in words is "one million, four hundred thousand, two hundred eighty-seven".