4345421 has 4 divisors (see below), whose sum is σ = 4601052. Its totient is φ = 4089792.

The previous prime is 4345403. The next prime is 4345423. The reversal of 4345421 is 1245434.

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 1155625 + 3189796 = 1075^2 + 1786^2 .

It is not a de Polignac number, because 4345421 - 2¹⁰ = 4344397 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 (4345423) 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, 127790 + ... + 127823.

It is an arithmetic number, because the mean of its divisors is an integer number (1150263).

Almost surely, 2^4345421 is an apocalyptic number.

It is an amenable number.

4345421 is a deficient number, since it is larger than the sum of its proper divisors (255631).

4345421 is a wasteful number, since it uses less digits than its factorization.

4345421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255630.

The product of its digits is 1920, while the sum is 23.

The square root of 4345421 is about 2084.5673412006. The cubic root of 4345421 is about 163.1838917244.

The spelling of 4345421 in words is "four million, three hundred forty-five thousand, four hundred twenty-one".