1405290 has 32 divisors (see below), whose sum is σ = 3407040. Its totient is φ = 370944.

The previous prime is 1405289. The next prime is 1405309. The reversal of 1405290 is 925041.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4002 + ... + 4338.

It is an arithmetic number, because the mean of its divisors is an integer number (106470).

2^1405290 is an apocalyptic number.

1405290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1405290 is an abundant number, since it is smaller than the sum of its proper divisors (2001750).

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

1405290 is a wasteful number, since it uses less digits than its factorization.

1405290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 1405290 is about 1185.4492819180. The cubic root of 1405290 is about 112.0096186467.

Subtracting from 1405290 its reverse (925041), we obtain a square (480249 = 693²).

The spelling of 1405290 in words is "one million, four hundred five thousand, two hundred ninety".