4152421 has 8 divisors (see below), whose sum is σ = 5110784. Its totient is φ = 3285360.

The previous prime is 4152409. The next prime is 4152433. The reversal of 4152421 is 1242514.

It is an interprime number because it is at equal distance from previous prime (4152409) and next prime (4152433).

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

It is not a de Polignac number, because 4152421 - 2⁵ = 4152389 is a prime.

It is a super-2 number, since 2×4152421² = 34485200322482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4152721) 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, 22725 + ... + 22906.

It is an arithmetic number, because the mean of its divisors is an integer number (638848).

Almost surely, 2^4152421 is an apocalyptic number.

It is an amenable number.

4152421 is a deficient number, since it is larger than the sum of its proper divisors (958363).

4152421 is a wasteful number, since it uses less digits than its factorization.

4152421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45651.

The product of its digits is 320, while the sum is 19.

The square root of 4152421 is about 2037.7490031895. The cubic root of 4152421 is about 160.7313008393.

Adding to 4152421 its reverse (1242514), we get a palindrome (5394935).

The spelling of 4152421 in words is "four million, one hundred fifty-two thousand, four hundred twenty-one".