1400865 has 16 divisors (see below), whose sum is σ = 2279616. Its totient is φ = 734400.

The previous prime is 1400863. The next prime is 1400873. The reversal of 1400865 is 5680041.

It is not a de Polignac number, because 1400865 - 2¹ = 1400863 is a prime.

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (1400863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 150 + ... + 1680.

It is an arithmetic number, because the mean of its divisors is an integer number (142476).

2^1400865 is an apocalyptic number.

1400865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1400865 is a deficient number, since it is larger than the sum of its proper divisors (878751).

1400865 is a wasteful number, since it uses less digits than its factorization.

1400865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1600.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 1400865 is about 1183.5814293913. The cubic root of 1400865 is about 111.8919291298.

The spelling of 1400865 in words is "one million, four hundred thousand, eight hundred sixty-five".