4313021 has 4 divisors (see below), whose sum is σ = 4352700. Its totient is φ = 4273344.

The previous prime is 4312969. The next prime is 4313027. The reversal of 4313021 is 1203134.

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 2839225 + 1473796 = 1685^2 + 1214^2 .

It is a cyclic number.

It is not a de Polignac number, because 4313021 - 2²² = 118717 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 4312987 and 4313005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4313027) 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, 19676 + ... + 19893.

It is an arithmetic number, because the mean of its divisors is an integer number (1088175).

Almost surely, 2^4313021 is an apocalyptic number.

It is an amenable number.

4313021 is a deficient number, since it is larger than the sum of its proper divisors (39679).

4313021 is a wasteful number, since it uses less digits than its factorization.

4313021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39678.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 4313021 is about 2076.7814039999. The cubic root of 4313021 is about 162.7773063889. Note that the first 3 decimals are identical.

Adding to 4313021 its reverse (1203134), we get a palindrome (5516155).

The spelling of 4313021 in words is "four million, three hundred thirteen thousand, twenty-one".