42837621 has 8 divisors (see below), whose sum is σ = 58194720. Its totient is φ = 28019472.

The previous prime is 42837617. The next prime is 42837623. The reversal of 42837621 is 12673824.

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

It is not a de Polignac number, because 42837621 - 2² = 42837617 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42837623) 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, 134551 + ... + 134868.

It is an arithmetic number, because the mean of its divisors is an integer number (7274340).

Almost surely, 2^42837621 is an apocalyptic number.

It is an amenable number.

42837621 is a deficient number, since it is larger than the sum of its proper divisors (15357099).

42837621 is a wasteful number, since it uses less digits than its factorization.

42837621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269475.

The product of its digits is 16128, while the sum is 33.

The square root of 42837621 is about 6545.0455307813. The cubic root of 42837621 is about 349.8982588632.

The spelling of 42837621 in words is "forty-two million, eight hundred thirty-seven thousand, six hundred twenty-one".