4152521 has 4 divisors (see below), whose sum is σ = 4253844. Its totient is φ = 4051200.

The previous prime is 4152517. The next prime is 4152523. The reversal of 4152521 is 1252514.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 132496 + 4020025 = 364^2 + 2005^2 .

It is a cyclic number.

It is not a de Polignac number, because 4152521 - 2² = 4152517 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4152493 and 4152502.

It is not an unprimeable number, because it can be changed into a prime (4152523) 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, 50600 + ... + 50681.

It is an arithmetic number, because the mean of its divisors is an integer number (1063461).

Almost surely, 2^4152521 is an apocalyptic number.

4152521 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

4152521 is a deficient number, since it is larger than the sum of its proper divisors (101323).

4152521 is a wasteful number, since it uses less digits than its factorization.

4152521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101322.

The product of its digits is 400, while the sum is 20.

The square root of 4152521 is about 2037.7735399205. The cubic root of 4152521 is about 160.7325910907.

The spelling of 4152521 in words is "four million, one hundred fifty-two thousand, five hundred twenty-one".