1555005 has 16 divisors (see below), whose sum is σ = 2520000. Its totient is φ = 818688.

The previous prime is 1554989. The next prime is 1555013. The reversal of 1555005 is 5005551.

It is not a de Polignac number, because 1555005 - 2⁴ = 1554989 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 621 + ... + 1869.

It is an arithmetic number, because the mean of its divisors is an integer number (157500).

2^1555005 is an apocalyptic number.

1555005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1555005 is a deficient number, since it is larger than the sum of its proper divisors (964995).

1555005 is a wasteful number, since it uses less digits than its factorization.

1555005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1340.

The product of its (nonzero) digits is 625, while the sum is 21.

The square root of 1555005 is about 1246.9983961497. The cubic root of 1555005 is about 115.8538836038.

The spelling of 1555005 in words is "one million, five hundred fifty-five thousand, five".