4156421 has 8 divisors (see below), whose sum is σ = 4396320. Its totient is φ = 3918672.

The previous prime is 4156417. The next prime is 4156433. The reversal of 4156421 is 1246514.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4156421 - 2² = 4156417 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 (4156441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4991 + ... + 5763.

It is an arithmetic number, because the mean of its divisors is an integer number (549540).

Almost surely, 2^4156421 is an apocalyptic number.

It is an amenable number.

4156421 is a deficient number, since it is larger than the sum of its proper divisors (239899).

4156421 is a wasteful number, since it uses less digits than its factorization.

4156421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1075.

The product of its digits is 960, while the sum is 23.

The square root of 4156421 is about 2038.7302420870. The cubic root of 4156421 is about 160.7828947466.

The spelling of 4156421 in words is "four million, one hundred fifty-six thousand, four hundred twenty-one".