42541531 has 4 divisors (see below), whose sum is σ = 45043992. Its totient is φ = 40039072.

The previous prime is 42541519. The next prime is 42541547. The reversal of 42541531 is 13514524.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 42541531 - 2¹³ = 42533339 is a prime.

It is a super-2 number, since 2×42541531² = 3619563719647922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42541496 and 42541505.

It is not an unprimeable number, because it can be changed into a prime (42542531) 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, 1251205 + ... + 1251238.

It is an arithmetic number, because the mean of its divisors is an integer number (11260998).

Almost surely, 2^42541531 is an apocalyptic number.

42541531 is a deficient number, since it is larger than the sum of its proper divisors (2502461).

42541531 is a wasteful number, since it uses less digits than its factorization.

42541531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2502460.

The product of its digits is 2400, while the sum is 25.

The square root of 42541531 is about 6522.3869097133. The cubic root of 42541531 is about 349.0902386503.

The spelling of 42541531 in words is "forty-two million, five hundred forty-one thousand, five hundred thirty-one".