1405542 has 16 divisors (see below), whose sum is σ = 2850480. Its totient is φ = 461952.

The previous prime is 1405531. The next prime is 1405561. The reversal of 1405542 is 2455041.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 1167 + ... + 2042.

It is an arithmetic number, because the mean of its divisors is an integer number (178155).

2^1405542 is an apocalyptic number.

1405542 is an abundant number, since it is smaller than the sum of its proper divisors (1444938).

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

1405542 is a wasteful number, since it uses less digits than its factorization.

1405542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3287.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 1405542 is about 1185.5555659690. Note that the first 4 decimals coincide. The cubic root of 1405542 is about 112.0163135251.

The spelling of 1405542 in words is "one million, four hundred five thousand, five hundred forty-two".