2317421 has 4 divisors (see below), whose sum is σ = 2380092. Its totient is φ = 2254752.

The previous prime is 2317391. The next prime is 2317433. The reversal of 2317421 is 1247132.

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 1297321 + 1020100 = 1139^2 + 1010^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2317421 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2317393 and 2317402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2317121) 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, 31280 + ... + 31353.

It is an arithmetic number, because the mean of its divisors is an integer number (595023).

2^2317421 is an apocalyptic number.

It is an amenable number.

2317421 is a deficient number, since it is larger than the sum of its proper divisors (62671).

2317421 is an equidigital number, since it uses as much as digits as its factorization.

2317421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62670.

The product of its digits is 336, while the sum is 20.

The square root of 2317421 is about 1522.3077875384. The cubic root of 2317421 is about 132.3330471110. Note that the first 3 decimals are identical.

The spelling of 2317421 in words is "two million, three hundred seventeen thousand, four hundred twenty-one".