2616021 has 6 divisors (see below), whose sum is σ = 3778710. Its totient is φ = 1744008.

The previous prime is 2616017. The next prime is 2616023. The reversal of 2616021 is 1206162.

It is a happy number.

2616021 is a `hidden beast` number, since 2 + 61 + 602 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2604996 + 11025 = 1614^2 + 105^2 .

It is not a de Polignac number, because 2616021 - 2² = 2616017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2615985 and 2616003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2616023) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 145326 + ... + 145343.

It is an arithmetic number, because the mean of its divisors is an integer number (629785).

2^2616021 is an apocalyptic number.

It is an amenable number.

2616021 is a deficient number, since it is larger than the sum of its proper divisors (1162689).

2616021 is a wasteful number, since it uses less digits than its factorization.

2616021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290675 (or 290672 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 2616021 is about 1617.4118213986. The cubic root of 2616021 is about 137.7887441892.

The spelling of 2616021 in words is "two million, six hundred sixteen thousand, twenty-one".