1955100 has 144 divisors (see below), whose sum is σ = 6944000. Its totient is φ = 423360.

The previous prime is 1955099. The next prime is 1955113. The reversal of 1955100 is 15591.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

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 47 ways as a sum of consecutive naturals, for example, 102891 + ... + 102909.

2^1955100 is an apocalyptic number.

1955100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1955100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3472000).

1955100 is an abundant number, since it is smaller than the sum of its proper divisors (4988900).

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

1955100 is a wasteful number, since it uses less digits than its factorization.

1955100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57 (or 36 counting only the distinct ones).

The product of its (nonzero) digits is 225, while the sum is 21.

The square root of 1955100 is about 1398.2489048807. The cubic root of 1955100 is about 125.0421191396.

The spelling of 1955100 in words is "one million, nine hundred fifty-five thousand, one hundred".