8307421 has 4 divisors (see below), whose sum is σ = 8381052. Its totient is φ = 8233792.

The previous prime is 8307413. The next prime is 8307437. The reversal of 8307421 is 1247038.

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 3663396 + 4644025 = 1914^2 + 2155^2 .

It is a cyclic number.

It is not a de Polignac number, because 8307421 - 2³ = 8307413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8307491) 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, 36646 + ... + 36871.

It is an arithmetic number, because the mean of its divisors is an integer number (2095263).

Almost surely, 2^8307421 is an apocalyptic number.

It is an amenable number.

8307421 is a deficient number, since it is larger than the sum of its proper divisors (73631).

8307421 is a wasteful number, since it uses less digits than its factorization.

8307421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73630.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 8307421 is about 2882.2597037741. The cubic root of 8307421 is about 202.5297096073.

The spelling of 8307421 in words is "eight million, three hundred seven thousand, four hundred twenty-one".