1555406 has 8 divisors (see below), whose sum is σ = 2396280. Its totient is φ = 756648.

The previous prime is 1555349. The next prime is 1555409. The reversal of 1555406 is 6045551.

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

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1555409) 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, 10436 + ... + 10583.

It is an arithmetic number, because the mean of its divisors is an integer number (299535).

2^1555406 is an apocalyptic number.

1555406 is a deficient number, since it is larger than the sum of its proper divisors (840874).

1555406 is a wasteful number, since it uses less digits than its factorization.

1555406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21058.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 1555406 is about 1247.1591718782. The cubic root of 1555406 is about 115.8638414313.

The spelling of 1555406 in words is "one million, five hundred fifty-five thousand, four hundred six".