2921601 has 8 divisors (see below), whose sum is σ = 3905824. Its totient is φ = 1942560.

The previous prime is 2921599. The next prime is 2921617. The reversal of 2921601 is 1061292.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2921601 - 2¹ = 2921599 is a prime.

It is a super-3 number, since 3×2921601³ = 74814188270833334403, which contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2929601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 306 + ... + 2436.

It is an arithmetic number, because the mean of its divisors is an integer number (488228).

2^2921601 is an apocalyptic number.

2921601 is the 914-th nonagonal number.

It is an amenable number.

2921601 is a deficient number, since it is larger than the sum of its proper divisors (984223).

2921601 is a wasteful number, since it uses less digits than its factorization.

2921601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2591.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 2921601 is about 1709.2691420604. The cubic root of 2921601 is about 142.9575077099.

Adding to 2921601 its reverse (1061292), we get a palindrome (3982893).

The spelling of 2921601 in words is "two million, nine hundred twenty-one thousand, six hundred one".