4342521 has 4 divisors (see below), whose sum is σ = 5790032. Its totient is φ = 2895012.

The previous prime is 4342517. The next prime is 4342523. The reversal of 4342521 is 1252434.

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 not a de Polignac number, because 4342521 - 2² = 4342517 is a prime.

It is a d-powerful number, because it can be written as 4⁷ + 3⁵ + 4¹¹ + 2⁹ + 5 + 2¹⁷ + 1 .

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4342523) 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, 723751 + ... + 723756.

It is an arithmetic number, because the mean of its divisors is an integer number (1447508).

Almost surely, 2^4342521 is an apocalyptic number.

It is an amenable number.

4342521 is a deficient number, since it is larger than the sum of its proper divisors (1447511).

4342521 is a wasteful number, since it uses less digits than its factorization.

4342521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1447510.

The product of its digits is 960, while the sum is 21.

The square root of 4342521 is about 2083.8716371216. The cubic root of 4342521 is about 163.1475823466.

Adding to 4342521 its reverse (1252434), we get a palindrome (5594955).

It can be divided in two parts, 43425 and 21, that multiplied together give a triangular number (911925 = T₁₃₅₀).

The spelling of 4342521 in words is "four million, three hundred forty-two thousand, five hundred twenty-one".