38542521 has 4 divisors (see below), whose sum is σ = 51390032. Its totient is φ = 25695012.

The previous prime is 38542489. The next prime is 38542523. The reversal of 38542521 is 12524583.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12524583 = 3 ⋅4174861.

It is not a de Polignac number, because 38542521 - 2⁵ = 38542489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38542523) 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, 6423751 + ... + 6423756.

It is an arithmetic number, because the mean of its divisors is an integer number (12847508).

Almost surely, 2^38542521 is an apocalyptic number.

It is an amenable number.

38542521 is a deficient number, since it is larger than the sum of its proper divisors (12847511).

38542521 is a wasteful number, since it uses less digits than its factorization.

38542521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12847510.

The product of its digits is 9600, while the sum is 30.

The square root of 38542521 is about 6208.2623172672. The cubic root of 38542521 is about 337.7899357647.

The spelling of 38542521 in words is "thirty-eight million, five hundred forty-two thousand, five hundred twenty-one".