1405684 has 24 divisors (see below), whose sum is σ = 2860928. Its totient is φ = 591840.

The previous prime is 1405681. The next prime is 1405693. The reversal of 1405684 is 4865041.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1405681) 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, 1297 + ... + 2119.

2^1405684 is an apocalyptic number.

1405684 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1405684 is an abundant number, since it is smaller than the sum of its proper divisors (1455244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1405684 is a wasteful number, since it uses less digits than its factorization.

1405684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 895 (or 893 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 1405684 is about 1185.6154519911. The cubic root of 1405684 is about 112.0200856834.

The spelling of 1405684 in words is "one million, four hundred five thousand, six hundred eighty-four".