5142521 has 4 divisors (see below), whose sum is σ = 5413200. Its totient is φ = 4871844.

The previous prime is 5142503. The next prime is 5142523. The reversal of 5142521 is 1252415.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5142521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5142493 and 5142502.

It is not an unprimeable number, because it can be changed into a prime (5142523) 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, 135311 + ... + 135348.

It is an arithmetic number, because the mean of its divisors is an integer number (1353300).

Almost surely, 2^5142521 is an apocalyptic number.

It is an amenable number.

5142521 is a deficient number, since it is larger than the sum of its proper divisors (270679).

5142521 is a wasteful number, since it uses less digits than its factorization.

5142521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270678.

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

The square root of 5142521 is about 2267.7127243106. The cubic root of 5142521 is about 172.6071140380.

Adding to 5142521 its reverse (1252415), we get a palindrome (6394936).

The spelling of 5142521 in words is "five million, one hundred forty-two thousand, five hundred twenty-one".