1406385 has 12 divisors (see below), whose sum is σ = 2437812. Its totient is φ = 750048.

The previous prime is 1406357. The next prime is 1406387. The reversal of 1406385 is 5836041.

It can be written as a sum of positive squares in 2 ways, for example, as 685584 + 720801 = 828^2 + 849^2 .

It is not a de Polignac number, because 1406385 - 2¹⁰ = 1405361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1406387) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15582 + ... + 15671.

It is an arithmetic number, because the mean of its divisors is an integer number (203151).

2^1406385 is an apocalyptic number.

1406385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1406385 is a deficient number, since it is larger than the sum of its proper divisors (1031427).

1406385 is a wasteful number, since it uses less digits than its factorization.

1406385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31264 (or 31261 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 1406385 is about 1185.9110421950. The cubic root of 1406385 is about 112.0387036730.

The spelling of 1406385 in words is "one million, four hundred six thousand, three hundred eighty-five".