1406540 has 12 divisors (see below), whose sum is σ = 2953776. Its totient is φ = 562608.

The previous prime is 1406539. The next prime is 1406543. The reversal of 1406540 is 456041.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 70327 = 1406540 / (1 + 4 + 0 + 6 + 5 + 4 + 0).

It is not an unprimeable number, because it can be changed into a prime (1406543) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 35144 + ... + 35183.

It is an arithmetic number, because the mean of its divisors is an integer number (246148).

2^1406540 is an apocalyptic number.

1406540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1406540 is an abundant number, since it is smaller than the sum of its proper divisors (1547236).

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

1406540 is a wasteful number, since it uses less digits than its factorization.

1406540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70336 (or 70334 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1406540 is about 1185.9763909960. The cubic root of 1406540 is about 112.0428195116.

The spelling of 1406540 in words is "one million, four hundred six thousand, five hundred forty".