4257121 has 8 divisors (see below), whose sum is σ = 4888800. Its totient is φ = 3666240.

The previous prime is 4257101. The next prime is 4257131. The reversal of 4257121 is 1217524.

It is a happy number.

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

It is not a de Polignac number, because 4257121 - 2¹¹ = 4255073 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4257092 and 4257101.

It is not an unprimeable number, because it can be changed into a prime (4257101) 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, 9976 + ... + 10393.

It is an arithmetic number, because the mean of its divisors is an integer number (611100).

Almost surely, 2^4257121 is an apocalyptic number.

It is an amenable number.

4257121 is a deficient number, since it is larger than the sum of its proper divisors (631679).

4257121 is a wasteful number, since it uses less digits than its factorization.

4257121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20399.

The product of its digits is 560, while the sum is 22.

The square root of 4257121 is about 2063.2791861500. The cubic root of 4257121 is about 162.0710073313.

The spelling of 4257121 in words is "four million, two hundred fifty-seven thousand, one hundred twenty-one".