2616921 has 16 divisors (see below), whose sum is σ = 3918720. Its totient is φ = 1725840.

The previous prime is 2616883. The next prime is 2616923. The reversal of 2616921 is 1296162.

It is not a de Polignac number, because 2616921 - 2¹⁰ = 2615897 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2616923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2311 + ... + 3251.

It is an arithmetic number, because the mean of its divisors is an integer number (244920).

2^2616921 is an apocalyptic number.

It is an amenable number.

2616921 is a deficient number, since it is larger than the sum of its proper divisors (1301799).

2616921 is a wasteful number, since it uses less digits than its factorization.

2616921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1053 (or 1047 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 2616921 is about 1617.6900197504. The cubic root of 2616921 is about 137.8045437121.

The spelling of 2616921 in words is "two million, six hundred sixteen thousand, nine hundred twenty-one".