1405020 has 24 divisors (see below), whose sum is σ = 3934224. Its totient is φ = 374656.

The previous prime is 1405009. The next prime is 1405039. The reversal of 1405020 is 205041.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1404987 and 1405005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11649 + ... + 11768.

It is an arithmetic number, because the mean of its divisors is an integer number (163926).

2^1405020 is an apocalyptic number.

1405020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1405020 is an abundant number, since it is smaller than the sum of its proper divisors (2529204).

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

1405020 is a wasteful number, since it uses less digits than its factorization.

1405020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23429 (or 23427 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 1405020 is about 1185.3353955738. The cubic root of 1405020 is about 112.0024446745.

The spelling of 1405020 in words is "one million, four hundred five thousand, twenty".