1601100 has 72 divisors (see below), whose sum is σ = 5155920. Its totient is φ = 426240.

The previous prime is 1601071. The next prime is 1601107. The reversal of 1601100 is 11061.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (1601107) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2404 + ... + 2996.

It is an arithmetic number, because the mean of its divisors is an integer number (71610).

2^1601100 is an apocalyptic number.

1601100 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 1601100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2577960).

1601100 is an abundant number, since it is smaller than the sum of its proper divisors (3554820).

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

1601100 is a wasteful number, since it uses less digits than its factorization.

1601100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616 (or 603 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

The square root of 1601100 is about 1265.3458025378. The cubic root of 1601100 is about 116.9875068843.

Adding to 1601100 its reverse (11061), we get a palindrome (1612161).

The spelling of 1601100 in words is "one million, six hundred one thousand, one hundred".