1955550 has 24 divisors (see below), whose sum is σ = 4850136. Its totient is φ = 521440.

The previous prime is 1955543. The next prime is 1955579. The reversal of 1955550 is 555591.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6369 + ... + 6668.

It is an arithmetic number, because the mean of its divisors is an integer number (202089).

2^1955550 is an apocalyptic number.

1955550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1955550 is an abundant number, since it is smaller than the sum of its proper divisors (2894586).

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

1955550 is a wasteful number, since it uses less digits than its factorization.

1955550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13052 (or 13047 counting only the distinct ones).

The product of its (nonzero) digits is 5625, while the sum is 30.

The square root of 1955550 is about 1398.4098111784. The cubic root of 1955550 is about 125.0517119374.

The spelling of 1955550 in words is "one million, nine hundred fifty-five thousand, five hundred fifty".