2546021 has 4 divisors (see below), whose sum is σ = 2580972. Its totient is φ = 2511072.

The previous prime is 2546017. The next prime is 2546029. The reversal of 2546021 is 1206452.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1716100 + 829921 = 1310^2 + 911^2 .

It is a cyclic number.

It is not a de Polignac number, because 2546021 - 2² = 2546017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2545984 and 2546002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2546029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17366 + ... + 17511.

It is an arithmetic number, because the mean of its divisors is an integer number (645243).

2^2546021 is an apocalyptic number.

It is an amenable number.

2546021 is a deficient number, since it is larger than the sum of its proper divisors (34951).

2546021 is an equidigital number, since it uses as much as digits as its factorization.

2546021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34950.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 2546021 is about 1595.6255826478. The cubic root of 2546021 is about 136.5486236985.

The spelling of 2546021 in words is "two million, five hundred forty-six thousand, twenty-one".