42557619 has 8 divisors (see below), whose sum is σ = 61108432. Its totient is φ = 26189280.

The previous prime is 42557617. The next prime is 42557621. The reversal of 42557619 is 91675524.

It is an interprime number because it is at equal distance from previous prime (42557617) and next prime (42557621).

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

It is not a de Polignac number, because 42557619 - 2¹ = 42557617 is a prime.

It is a super-2 number, since 2×42557619² = 3622301869898322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 1091221 = 42557619 / (4 + 2 + 5 + 5 + 7 + 6 + 1 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42557617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 545572 + ... + 545649.

It is an arithmetic number, because the mean of its divisors is an integer number (7638554).

Almost surely, 2^42557619 is an apocalyptic number.

42557619 is a deficient number, since it is larger than the sum of its proper divisors (18550813).

42557619 is a wasteful number, since it uses less digits than its factorization.

42557619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1091237.

The product of its digits is 75600, while the sum is 39.

The square root of 42557619 is about 6523.6200839718. The cubic root of 42557619 is about 349.1342384454.

The spelling of 42557619 in words is "forty-two million, five hundred fifty-seven thousand, six hundred nineteen".