4237421 has 4 divisors (see below), whose sum is σ = 4374144. Its totient is φ = 4100700.

The previous prime is 4237417. The next prime is 4237423. The reversal of 4237421 is 1247324.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4237421 - 2² = 4237417 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 (4237423) 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, 68315 + ... + 68376.

It is an arithmetic number, because the mean of its divisors is an integer number (1093536).

Almost surely, 2^4237421 is an apocalyptic number.

It is an amenable number.

4237421 is a deficient number, since it is larger than the sum of its proper divisors (136723).

4237421 is a wasteful number, since it uses less digits than its factorization.

4237421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136722.

The product of its digits is 1344, while the sum is 23.

The square root of 4237421 is about 2058.4996963808. The cubic root of 4237421 is about 161.8206239948.

The spelling of 4237421 in words is "four million, two hundred thirty-seven thousand, four hundred twenty-one".