42214581 has 8 divisors (see below), whose sum is σ = 62540160. Its totient is φ = 28143036.

The previous prime is 42214577. The next prime is 42214589. The reversal of 42214581 is 18541224.

It is not a de Polignac number, because 42214581 - 2² = 42214577 is a prime.

It is a super-2 number, since 2×42214581² = 3564141698011122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 1563503 = 42214581 / (4 + 2 + 2 + 1 + 4 + 5 + 8 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42214589) 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, 781725 + ... + 781778.

It is an arithmetic number, because the mean of its divisors is an integer number (7817520).

Almost surely, 2^42214581 is an apocalyptic number.

It is an amenable number.

42214581 is a deficient number, since it is larger than the sum of its proper divisors (20325579).

42214581 is a wasteful number, since it uses less digits than its factorization.

42214581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1563512 (or 1563506 counting only the distinct ones).

The product of its digits is 2560, while the sum is 27.

The square root of 42214581 is about 6497.2748902905. The cubic root of 42214581 is about 348.1936348057.

The spelling of 42214581 in words is "forty-two million, two hundred fourteen thousand, five hundred eighty-one".