1403985 has 32 divisors (see below), whose sum is σ = 2506752. Its totient is φ = 665280.

The previous prime is 1403981. The next prime is 1404059. The reversal of 1403985 is 5893041.

It is not a de Polignac number, because 1403985 - 2² = 1403981 is a prime.

It is a Curzon number.

1403985 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1403981) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10992 + ... + 11118.

It is an arithmetic number, because the mean of its divisors is an integer number (78336).

2^1403985 is an apocalyptic number.

1403985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1403985 is a deficient number, since it is larger than the sum of its proper divisors (1102767).

1403985 is a wasteful number, since it uses less digits than its factorization.

1403985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 1403985 is about 1184.8987298499. The cubic root of 1403985 is about 111.9749359305.

The spelling of 1403985 in words is "one million, four hundred three thousand, nine hundred eighty-five".