2670421 has 4 divisors (see below), whose sum is σ = 2875852. Its totient is φ = 2464992.

The previous prime is 2670373. The next prime is 2670439. The reversal of 2670421 is 1240762.

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 1322500 + 1347921 = 1150^2 + 1161^2 .

It is a cyclic number.

It is not a de Polignac number, because 2670421 - 2¹⁷ = 2539349 is a prime.

It is a super-2 number, since 2×2670421² = 14262296634482, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2670392 and 2670401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2670491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102696 + ... + 102721.

It is an arithmetic number, because the mean of its divisors is an integer number (718963).

2^2670421 is an apocalyptic number.

It is an amenable number.

2670421 is a deficient number, since it is larger than the sum of its proper divisors (205431).

2670421 is a wasteful number, since it uses less digits than its factorization.

2670421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205430.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 2670421 is about 1634.1422826670. The cubic root of 2670421 is about 138.7373020872.

The spelling of 2670421 in words is "two million, six hundred seventy thousand, four hundred twenty-one".