42537921 has 8 divisors (see below), whose sum is σ = 58546944. Its totient is φ = 27443760.

The previous prime is 42537917. The next prime is 42537931. The reversal of 42537921 is 12973524.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42537921 - 2² = 42537917 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42537931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 228606 + ... + 228791.

It is an arithmetic number, because the mean of its divisors is an integer number (7318368).

Almost surely, 2^42537921 is an apocalyptic number.

It is an amenable number.

42537921 is a deficient number, since it is larger than the sum of its proper divisors (16009023).

42537921 is a wasteful number, since it uses less digits than its factorization.

42537921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457431.

The product of its digits is 15120, while the sum is 33.

The square root of 42537921 is about 6522.1101646630. The cubic root of 42537921 is about 349.0803639750.

The spelling of 42537921 in words is "forty-two million, five hundred thirty-seven thousand, nine hundred twenty-one".