1540806 has 8 divisors (see below), whose sum is σ = 3081624. Its totient is φ = 513600.

The previous prime is 1540789. The next prime is 1540807. The reversal of 1540806 is 6080451.

It is a sphenic number, since it is the product of 3 distinct primes.

1540806 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1540807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128395 + ... + 128406.

It is an arithmetic number, because the mean of its divisors is an integer number (385203).

2^1540806 is an apocalyptic number.

1540806 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1540806 is a wasteful number, since it uses less digits than its factorization.

1540806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256806.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 1540806 is about 1241.2920687735. The cubic root of 1540806 is about 115.5001780324.

It can be divided in two parts, 1540 and 806, that added together give a triangular number (2346 = T₆₈).

The spelling of 1540806 in words is "one million, five hundred forty thousand, eight hundred six".