1601280 has 108 divisors (see below), whose sum is σ = 5580120. Its totient is φ = 423936.

The previous prime is 1601273. The next prime is 1601287. The reversal of 1601280 is 821061.

It is an interprime number because it is at equal distance from previous prime (1601273) and next prime (1601287).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1601287) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11451 + ... + 11589.

2^1601280 is an apocalyptic number.

1601280 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 1601280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2790060).

1601280 is an abundant number, since it is smaller than the sum of its proper divisors (3978840).

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

1601280 is a wasteful number, since it uses less digits than its factorization.

1601280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166 (or 149 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 1601280 is about 1265.4169273406. The cubic root of 1601280 is about 116.9918907375.

It can be divided in two parts, 1601 and 280, that added together give a palindrome (1881).

The spelling of 1601280 in words is "one million, six hundred one thousand, two hundred eighty".