1501668 has 72 divisors (see below), whose sum is σ = 4455360. Its totient is φ = 417600.

The previous prime is 1501667. The next prime is 1501673. The reversal of 1501668 is 8661051.

It is not an unprimeable number, because it can be changed into a prime (1501663) 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, 14818 + ... + 14918.

It is an arithmetic number, because the mean of its divisors is an integer number (61880).

2^1501668 is an apocalyptic number.

1501668 is a gapful number since it is divisible by the number (18) 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 1501668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2227680).

1501668 is an abundant number, since it is smaller than the sum of its proper divisors (2953692).

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

1501668 is a wasteful number, since it uses less digits than its factorization.

1501668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177 (or 172 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 1501668 is about 1225.4256403389. The cubic root of 1501668 is about 114.5138392786.

The spelling of 1501668 in words is "one million, five hundred one thousand, six hundred sixty-eight".